I don't see any Oedipal elements in GF, other than Michael tries (and fails) to recreate the same level of trust and control that his father had. Hmm. You could even make an argument that he didn't even try because he learned the wrong lessons and times were different.

In Scarface, the incest thing is there but is it Oedipal since it's not directed at his mother?

"When the snows fall and the white winds blow, the lone wolf dies but the pack survives."
Winter is Coming

Now this is the Law of the Jungle—as old and as true as the sky; And the wolf that shall keep it may prosper, but the wolf that shall break it must die.
As the creeper that girdles the tree-trunk, the Law runneth forward and back; For the strength of the Pack is the Wolf, and the strength of the Wolf is the Pack.