I would say that Parrot guy from Square Pegs but that guild is very bad so he loses points for being in that guild. As for that other Sin in Square Bads, Filthina, s/he's is the epitome of BRAZIL FORCE.
Good Sins/Shads include
Darkyoda
Turrican
Senna
Deoxys
Xekshek
those are the guys off the top of my head