My son adores RPG games. His favorite is World of Warcraft, second is minecraft, third is Skyrim?

What is the question here?

You raised him well.

That not really a question…

Also, I'm not sure I'd call Minecraft an "RPG". It's more of a sandbox/survival game with a handful of RPG elements in it.

Okay and the question is?

asking for recommendations?

oblivion
morrowind
dragons dogma
and kingdoms of amalur would be good places to start

That poor child.