The Black Widow.
Skintight black catsuit?
Mine was Natasha Romanoff, Russian spy and bad guy turned hero. She was evidently rich and had a chauffeur named Ivan. This was the way she appeared in Amazing Adventures 1 through 8 and The Amazing Spider-Man No. 86. That Black Widow has been retconned pretty much out of existence I think.
As far as characters go...the Widow is pretty bad in the comics. Besides being a peak level athlete, gymnast and acrobat she is a martial artist trained in pretty much every style. Add to that the fact that she is an expert marksman and has had extensive spy training. That enough? Nope. She also has been given the Russian version of the Super-Soldier Serum that created Captain America. That means she is immune to most (maybe all) infections and diseases and has an enhanced healing factor.
She is also a brilliant strategist, almost on the level of Cap himself. So yes, she is a hotter, female version of Captain America in many ways.
She is also armed with the Widow bite, which in the comics was far more than a taser. It could fire distance blasts and also fire a webline that allowed her to swing like Spider-Man.
The Comics Buyer's Guide's ranked her 31st on their "100 Sexiest Women in Comics" list, but I think she deserves a lot higher.