Answer= Sakura. For Tsunade there was no triangle.
Jiraiya's attraction was one sided and he kind of hit anything female. Dan died years ago and Tsunade didn't show any interest in anyone since.
McAfeezy: won 200 answer was orichamoru
BloodTrain ZRO: won 500 answer was rin: because she was in a love triangle, and among the few ones to exceed on this field, Even at this age. (remeber when she took out obito eyes and planted it in kakashi. sakura can't do that lol