To hear Obi-wan tell it you'd think that when Anakin became Vader he became a completly different person. But there were people who worked with him as Anakin who continued to work along side him as Vader. You can't tell me they all thought he was someone new.
Five people who recognized that Vader was Anakin inside that suit.
Plus one who had to be told after the fact.
Possible candidates: Yularen, Tarkin, Rex, Cody, Boba Fett(?).
Ahsoka could be the +1 or one of the ones who knew. The only restriction is that they can't have been in the loop regarding the events of ROTS. You could even use Jar-Jar if that's what floats your boat.
Gen, seeing Anakin in Vader, 5+1
Five people who recognized that Vader was Anakin inside that suit.
Plus one who had to be told after the fact.
Possible candidates: Yularen, Tarkin, Rex, Cody, Boba Fett(?).
Ahsoka could be the +1 or one of the ones who knew. The only restriction is that they can't have been in the loop regarding the events of ROTS. You could even use Jar-Jar if that's what floats your boat.