I think I know who all of the other characters are, but I'm stumped on the - or what appears to be - female Bounty Hunter.
As stated in the novel "The Old Republic: Deceived", her name is Shae Vizla, though Malgus often refers to her simply as "The Mandalorian".
It's fitting that she's named since she single-handedly shut down Coruscant's defense grid and also took part in the attack on Alderaan :)
Malgus probably chose her for the attack since she had a very deep-seated hatred of the Jedi because her brother was killed by Jedi Master Aurei Eadon.
She's the Mandalorean Mercenary featured in the Imperial intro movie. I don't think she's ever named.