Well.............the good news is, they're all usable characters; no matter how high you go. You'll find that batch useful.
However, as a team.......there's no totally awesome leader. For a jedi team though, you have some of the punchiest characters as you can get.
I think Bastila Shan, would totally revamp your team for you. Her leadership is very very good, and she can also work very well with Yoda. She buffs Yoda, then Yoda buffs the whole team. With how hard your punchers hit..............they'll do scary damage!
After that Jedi Knight Revan isn't 'that' hard to get. Once/If you get him, well you're talking about 'elite' level teams.
Long term though. You have to consider Legends......or even though they seem a distance away Galatic Legends now. If you don't start preparing for them, you'll be left behind once you hit a million or so.
Ezra for example is useful for getting Emperor Palpatine and Thrawn.
Anyway, I urge you to start thinking long term.
