I've always wondered how well trained Heinrich and Helmut were in combat.
I think I've seen contradictory things (which is a very Zemo thing in and of itself) about what kind of fighters they are.
Back when Helmut was working with the Red Skull's daughter in DeMattis's Cap run I think she mentioned that Helmut was an excellent fighter. In Nicieza's Thunderbolt run it's implied Heinrich was never a fighter but Helmut secretly came to love it when he was training in the lead up to the Thunderbolts introduction. During Busiek's run Helmut was shown to really be a rather good fighter (I thought).
Nicieza's run seemed to imply Heinrich didn't like to get his hands dirty and wasn't much of a fighter and thought it was undignified but I think there were flashbacks here and there in Busiek's run that showed Heinrich liked to get his hands dirty and kill people in fights.
My impression of Heinrich was that he was an excellent fighter by real-world, normal-people standards ... which makes him no competition at all for Cap.