Well first. Its only Apri so how many appearances and actual fights have they been in? Im sure Superman will probably have 2-3 times as many as Thor and how many fights has Surfer been in this year period? Maybe 1 or two? Jane's only straight up loss off top of my head was to the Destroyer and that was like 2 years ago. There was also Gladiator but she was fighting more than just him and and other context. Just thought about this.
Destroyer>Jane. Phoenix>Destroyer. phoenix>Jane but Jane lasts quite a bit longer than the Destroyer
Destroyer>Gladiator. Gladiator>Jane
Jane>Mangog> Destroyer
Whoever Destroyer beats Jane loses to and vice versa. All under Aaron. Wierd.
Anyway as for as the thread goes. Whoever has the least appearances probably has the best track record. So im gonna say Surfer on a guess cause im to azy to research it.