Depends on what you define as exploit. Essentially exploit means to utilize something. Other definitions include giving an unfair advantage over someone else. As for exploiting their sexuality, during the attitude era they were all exploited in that way. Sable was certainly used for her sex appeal in many ways from playboy to her catchphrase 'this is for all the women who want to be me, and for all the men who came to see me'. But you could make an argument for pretty much everyone who was seen as sexual.
Sable probably, Torrie was up there too in that same vein. But that was the era, most of the divas were eye candy especially when they were still posing for Playboy (Which I wish would still happen but hey =( )
Sable def has to be the top choice...but you can make an argument that everybody in the Attitude Era was exploited from the countless Bikini Contests, Bra and Pantie Matches, to almost every diva having a storyline where they was involved sexually with a Male wrestler....im not complaining it was great TV and all the Divas got more Tv time then they do now
Considering it's his daughter vince never really made sure steph wasn't exploited on weekly basis.... tits out, shorts skirts and every close up camera angle that was possible without being in her cleavage lol
So she's gotta rank pretty high.
Most of the AE girls were doing swim suit segments week to week also.
then mickey probably had the most upskirt moments than any other diva.