I know that Finn's canonical (I.E stated within the show) alignment is Lawful Good and that Jake's is probably neutral-chaotic good, and that Flame Princess and Flame King both are evil, and that Hudson Aberdeer is Chaotic Evil.
The show really simplifies good versus evil though mind you.
A lot of the most evil creatures in the show are actually outright beneign.
And one of the most chaotic creatures are actually extremely lawful. (That episode seemed like a Satire on Chaotic kingdoms)
Also though I am one of the few people who do this... I like to say "Neutral Leaning Evil" and "Neutral Leaning Good" a lot of the time to explain characters who's motivations are not good or evil, but would chose good or evil if they had to. Ice King for example is Chaotic Neutral leaning evil. While Vampira is Chaotic Neutral leaning good.
Mind you the Ice King outright doesn't want to do any evil. He doesn't want to really hurt anyone and often seems oblivious to how he is hurting them. So "Leaning Evil" is probably not a good way to describe his leaning.
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Watching Ultimate Spiderman
Hating it and Liking it at the same time. The problem I am having is that Spiderman is so terrible most of the time.
He doesn't act like a person who was a super hero for over a year, he is acting like a kid who is being asked to clean his room. It sometimes takes a while for him to feel like Spiderman.
Ben 10 the original series for example had Ben be a very egotistical, prideful, and childish character... but when Gwen got super powers he didn't get jealous or start complaining because he been through experiences where he needed back up that just didn't exist. This is great characterisation. He isn't any less childish but he feels like an organic character. It is why a lot of people prefer the kid Ben to the Teen Ben.
Along with this there are just so few concequences in Ultimate Spiderman. He will do the most horrific and outlandish things sometimes and no one will ever speak of it again.
I don't want to go into a rant because I havn't given up on the series. I feel like it is building up to something but I just don't know to what. If this is just an episodic action series with no real story... or if it is just sleeping and waiting to hit you with story bombs.