I enjoyed JKBart's way of responding to this thread so I'll do the same.
1: Stomp; They are all superior to their opponents and have numbers on their side
2: Brothers lose to numbers, though any confrontation of between them individuallly and the SWTOR protags is arguable 1v1.
3: Better than 2 by far, though Ventress would likely find herself stomped by Nox or Barsenthor very quickly. As well as decently outpaced by the more martial protags. The others are able to stalemate the brothers enough for this weak link to fall.
4: Closest fight where I would say the TOR team takes the slight majority. The extra man (likely Barsenthor) can support the others with a wide range of force abilities while the fight drags on. Keeping the ROTS team from scoring a kill while keeping the TOR team in better shape via healing/rejuvenation. It would be a drawn-out contest though.
5:This is essentially the opposite of 4 for me. I see the possibility of the TOR team winning, but in a Deadliest Warrior-esque fashion, it would not be a majority. In fact were Krayt not the absolute win-condition for the One Sith team, I would give it to the ToR team.
6: They die, Nox in particular loses a few extra Mario's before dying permanently.
7: Truth be told I don't feel I know enough about LOTF Luke to make a call here. Likely Luke though.