Darth Sion runs the gauntlet
We'll, I read about Darth Sion and he seems like a complete badass. Really, how strong id the dude? He gets 3 hours of rest between each battle.
1) Kit Fisto
2) ROTS Obi-Wan
3) Yoda
4) Darth Sidious and Darth Tyranus
5) NJO Luke
6) Exar Kun
7) Darth Traya
8) Darth Nihilus
9) Darth Revan, Darth Malak, Darth Bane, Darth Vader (ROTS, before he gets injured), Darth Maul and General Grievous
10) The entire TPM Jedi order