OK, the answer about what Sleepers are most effective at Promoting Liberalism is a bit complicated. Here goes an explanation:
First of all, Cable News Anchors and Radio Personalities are both special cases when it comes to Promoting Liberalism; both are quite good at Promoting Liberalism if Cable News and AM Radio are held in high esteem by the public (if the Cable News and AM Radio issues are Conservative rather than Liberal). But if Cable News and AM Radio are held in low esteem (and any Cable News Anchor or Radio Personality who is a Sleeper will gradually decrease the public's esteem for those media outlets), then their influence decreases dramatically.
Corporate CEOs, Politicians, and Eminent Scientists have 10 times the effect of ordinary Sleepers on public opinion. Death Squad Officers, Educators, and Military Officers have triple the effect of ordinary Sleepers on public opinion. Actors, Police Gang Units, Military Police, and Navy SEALs have double the impact of ordinary Sleepers on public opinion.
Art Critics get bonuses based on Writing and Art skills, Painters and Sculptors get bonuses based on Art skills, Music Critics get bonuses based on Writing and Music skills, Musicians get bonuses based on Music skills, Authors and Journalists get bonuses based on Writing skills, Hangin' Judges get bonuses based on Writing and Law skills, Lawyers get bonuses based on Law skills, Lab Techs and Eminent Scientists get bonuses based on Science skills, Corporate CEOs and Corporate Managers get bonuses based on Business skills, Priests and Nuns get bonuses based on Religion skills, and Educators get bonuses based on Psychology skills. These bonuses are applied BEFORE the multipliers, making anyone listed in this paragraph as well as the previous one (Corporate CEOs, Eminent Scientists, and Educators) have those bonuses multiplied by their multipliers to be super-effective at Advocating Liberalism. The skills and attributes that affect Advocating Liberalism for everyone, whether or not they have those bonuses, are Charisma, Heart, Intelligence, and Persuasion.
Now, there is the number of issues which each occupation affects in their advocacy. Radio Personalities and Cable News Anchors affect ALL issues except for public perceptions of the Liberal Crime Squad and Conservative Crime Squad (24 issues total!), and also change public opinion to be less favorable towards the media outlets they work for (AM Radio and Cable News, respectively), but their individual effects on each issue are decreased by the fraction of people who don't like their media outlets (so if 90% of people don't like Cable News, a Cable News Anchor has 90% less impact on each issue).
Priests, Painters, Sculptors, Authors, Journalists, Psychologists, Musicians, Art Critics, Music Critics, and Actors affect Women's Rights, Civil Rights, Gay Rights, Free Speech, Drugs, and Immigration (6 issues).
Lawyers affect Police Behavior, Death Penalty, Gun Control, and Drugs (4 issues). Hangin' Judges affect those 4 plus Justices, Free Speech, and Intelligence (7 issues).
Lab Techs affect Nuclear Power, Animal Research, and Genetic Engineering (3 issues). Eminent Scientists affect those 3 plus Pollution (4 issues).
Corporate Managers affect Women, Taxes, Corporate Culture, Worker's Rights, Pollution, and Civil Rights (6 issues). Corporate CEOs affect those 6 plus CEO Salaries (7 issues).
Police Officers, Police Gang Units, and SWAT Officers affect Police Behavior, Drugs, Torture, Gun Control, and Prisons (5 issues). Death Squad Officers also affect Death Penalty and have double the effect on Prisons (6 or 7 issues, depending on whether you count Prisons twice).
Educators, Prison Guards, and Prisoners affect Police Behavior, Death Penalty, Drugs, Torture, and Prisons (5 issues).
Agents affect Intelligence, Torture, Prisons, and Free Speech (4 issues). Secret Security affect those 4 plus having double the effect on Intelligence (4 or 5 issues, depending on whether you count Intelligence twice).
Elite Security affect Gun Control (1 issue).
Soldiers, Veterans, Military Police, Military Officers, and Navy SEALs affect Military, Torture, Gay Rights, and Women (4 issues).
Sweatshop Workers affect Immigration and Worker's Rights (2 issues).
Child Workers, Genetic Monsters, Guard Dogs, Transients, Crackheads, Tanks, Hippies, Union Workers, Liberal Judges, and Mutants have NO EFFECT AT ALL ON ANY ISSUE. Having them Advocate Liberalism achieves zip, nada, zero, nothing. Other than decreasing their Infiltration percentage by 2% (which happens whenever anyone Advocates Liberalism). So don't do it.
Politicians affect 3 random issues, with the exception of views on AM Radio, Cable News, the Liberal Crime Squad, and the Conservative Crime Squad (so 3 issues).
If Free Speech laws are Arch-Conservative, Firefighters affect Free Speech, otherwise they are in the "everybody else" category and affect a random issue (1 issue).
Everybody else affects a random issue (1 issue).
As for things OTHER than Promoting Liberalism, I mean, seriously, this post is long enough, it would take FOREVER to look up all that information and post it here and this post would be VERY long if I did that. Anyway this should help y'all figure out how best to Promote Liberalism.
Oh, and another thing. The multiplier of 20 for Politicians and the ability of Politicians to affect 3 random issues are only present in recent SVN builds off SourceForge. In any builds that have been officially released (4.07.3 beta and earlier), Politicians are in the "everybody else" category and just have a small amount of influence on 1 issue, just like anyone whose occupation wasn't listed above. This doesn't make any sense, you would expect that a Politician would have more influence than, say, a Sweatshop Worker. Which is why that was fixed. Seriously, in 4.07.3 beta and earlier, a Sweatshop Worker has more of an affect when Promoting Liberalism as a Sleeper than the President of the United States of America. Which is ridiculous, and not the case anymore in recent builds on SourceForge, where Politicians actually do have large amounts of influence, following the forumulae described above.