I just kind of noticed that there have been a few male Power Rangers who are considered to be a major hit with female fans. They are:
Leo Colbert- There were times that he would rip off his blouse before transforming. This was considered to be kind of eye-catching for the women and ridiculous for some.
Ryan Mitchell- He's the first PR only exclusive ranger with no Super Sentai counterpart. He had an evil tattoo that was slowly killing him.
Cole Evans- He was kind of popular too. The first time I saw him, I felt like he would make a good barbarian type character, more than the other two above. He was really that muscular as a guy, he looks like he could rip anyone apart.