how about lieutenant richard castillo-ncc1701c. Yesterdays Enterprise. He must have put up one hell of a fight against the romulans when he went back 2 his own time.After all he managed to impress the Klingons even though he lost. After losing captain garrett and alot of his crew that would be 1 battle i'd have loved 2 have seen. especially with Tasha Yar at his side.she was a skilled fighter