Doesn't Sentry count as on Earth? I'm a little hazy on that one.

[ Robbie was out of the loop for most of Sentry's hayday, but he knows enough to know that he was definitely on Earth for awhile. ]

And shouldn't Thor be technically off Earth? But either way, I think Sphinx should be up there, and anybody else who gets too world-bendy. Scarlet Witch, and that guy the X-Men keep going up against.