I have ONE that might beat CAP
Bombardier. Flying power armored type.
If Bombardier shoots first and hits before CAP realizes he's being attacked, he'll win. If cap knows he's being attacked, harder, but would still either win or be a draw. Character is about 350 points.
The relevant powers: Flight speed high enough to almost always make sure he's attacking from a direction cap is not able to protect with the 180 degree arc for the shield.
Effective OCV of 15 with his ranged attacks.
-20 vs range mods.
FF that is part of a multipwer (1 slot is ED, the other PD, so he has to allocate points between them, and against CAP, everything goes into PD to avoid shield damage)
Rapid Attack skill.
The attack that would do CAP in (unless he has immunity to toxins someplace I missed) is a 4d6 NND (immunity to toxins) 1-turn continuous charge hyper-velocity narco-dart attack.
Since Bombardier has speed 5, and could shoot twice in one phase with a good chance of hitting CAP when he's not aware (or from a direction the shield ISN'T due to his high flight speed) if he hits with both darts Cap would suck 5 consecutive 4d6 attacks from each dart for a total of 40d6 worth of stun over one turn just from those first two darts hitting him.
That's, what? 140 stun on average rolls? Unless Cap does nothing but take recoveries for the next 5 phases (which would make Bombardier's life a lot easier) even CAP would have a hard time with that.
Since Bombardier can do that from ranges so extreme Cap probably couldn't even see him effectively he'd have a very tough time fighting back. If Bombardier runs out of Narco Darts or feels he can't do enough damage to win, he switches flight to mega scale and bugs out.
If Cap knows it's coming, though, whole other ball game.