so you want some hacks here is my reconmendation
Lucario
Either AGFan latest mewtwo update(but use the vertex since the psa will be updated really soon to fit pikazz import)
Sdoom kid Buu
Ike
IIif KH fan choose a cloud there are alot of fun clouds to choose from xD
Kon Naruto(like this psa)
Marth
well if your a Roy Fan there are an almost perfect melee roy over marth i keep marth and roy rel ported over DDD
there are loads of marth and ike psa but im not to interelly of them since i didnt use half of them :S
Pit
waluigi psa really fun moveset
Goku 1.5 from mariodk he can go SS no need to say more
Sonic
there are alot of shadows psa i happen to like sdoom V1 or V2 theres also a version over DK if you want to keep both
Falco
Scizor psa by KJP
Silver by KJP too
Sheik
if you like marvel the spidey psa is the way to go
this are some hacks i really like using and are preety fun other hacks without psas i recomend ar mostly one slot size mods(every model keeps the actual size except the one mentioned over the same character)
Dr mario by kth
pichu by kth with one slot size mod
young link(cant remenber who made it) over link with one slot size mod
bowser jr over bowser by starwaffle with one slot size mod
this are the hacks i fell that dont need a psa to fit well xD since they can fit well over the original character