Ju87 D5 is the greatest plane ever, closely followed by the !!Hs129 b2!!
discuss
Both are fun but i'd like to point out that both are somewhat weak plaforms that fly slow gain alt slow and turn slow making Yak-9s much better due to a better platform their guns are mounted in.
Heck even the ME-410 wit the 50mm gun has much better flight characteristics than those 2 and unlike the russians it's pin point accurate.
I'm not sure however if the 50 mm gun loaded with AP shells on the ME410 can damage bunkers. It does 2 shot light bunkers but i have no idea about normal ones so the 75mm gun might have an upper hand in that department... as well as being able to engage tanks from more angles and pop them more reliably.
As for trolling aircraft... i think the plane is too sluggish for that really... at least the stuka starts at bobmer altitude and can turn pretty well allowing it to quickly unload a hail of 37 mm shells on some poor bomber but the HS... TBH against aircraft the 50 mm gun was already overkill and a 1 shot kill is still a one shot kill no matter how much more ravaged the enemy plane is after being hit because it's likely to have been utterly demolished after one shell anyway.
Also lawl at my attempts to down a B-17 in a FW-190. Set it on fire twice and destroyed 3 of its engines and it KEPT GOING. i still peppered it with the MG while the cannons were reloading only to get "TARGET UNDAMAGED"... damn what did htey plate this thing with.