Fictional characters smart enough to match Mr fantastic

[Riv86672]

^^^never heard of him, so Googled. He’s so cute!!!

I was going to add Prof. Farnsworth to my list, but he’s just so sporadic.
He’s def. brilliant though.

Same w. Prof. Utonium. Other than creating Chemical X he never really drove the PPG cartoon w. offbeat inventions or anything.
Again, he’s brilliant, but sporadic.

[Steel Inquisitor]

Lex Luthor, when he's a mad scientist.