LOL maybe the answer can be found in the title Shichibukai. Who is truly a member anymore:
Mihawk-Probably working on agenda with Shanks
Blackbeard-no longer a member since he betrayed the government
Boa-not so secretly working for Luffy
Jimbei-Chose to help WB and Luffy and is no longer one
Crocodile- kicked out of corruption
So that leaves us with Kuma and crazy ass Donflamingo. In this matchup I got to give it to the Pacifista.