Shazam (Marvel) might not be vulnerable to telepathy...not sure about that. And Tony has to have some sort of neural inhibitor or something in his arsenal. I still stick with Thor and MM. Thor's the most powerful guy on either team (not by a whole lot, but he is). I'd match him with Cpt. Marvel...it would be a long fight, but Thor would pull it out (there have been threads on this fight, and "Thor wins" is the general consensus). And I can't see Tony beating a well-written MM. At worst, MM could keep Tony occupied long enough for Thor to provide reinforcement.
-DM