Capcom characters with similarities to other villains: G.O.D.

This is G.O.D.

And these are villains who are mentally similar to him:

M. Bison

Dr. Weil

These who look physically:

0²

Azathoth

(Note that these are mostly generic doomsday villains, since they are lovecraftian horrors, though, they are similar in physical apperance)

And these who look both, mentally and phisically:

Shin Scion

X(Copy)