Kovalev - Stevenson
Kovalev - Beterbiev
Kovalev - Ward
Joshua - Parker
GGG - Canelo
See the pattern? Most interesting fighter and division out there is Kovalev and the Light heavyweight division.
this is really something you should be discussing face to face with your coach not strangers on a boxing message board
+1 it also depend on your fighting style, explosion and so on.