Here's my list so far, it is subject to expansion and change in the future:
Celestial/Force Wielder: The Father
Human: Luke Skywalker
Sith: Vitiate
Twi'lek: Kas'im
Iktochi: Darth Cognus
Gen'Dai: Durge
Dathomirian: Mother Talzin
Muun: Darth Plagueis
Yoda's Species: Yoda
Pa'un: Darth Desolous
Bith: Darth Tenebrous
Yuuzhan Vong: Onimi
Kaleesh: Grievous
Besalisk: Pong Krell
Planet: Zonama Sekot
Neti: T'ra Saa
Nagai: Darth Nihl
Barabel: Saba Sebatyne
Quarren: Darth Azard
Duros: Cad Bane (As far as I can tell, there are *no* Duros force users)
Mon Calamari: Cilghal (Not the only one Mon Cal Jedi, but the one time she faced a full Jedi opponent, she 'flattened him like a bug'😉
Whiphid: K'Khuhk, of course
Wookie: Tyvokka
Chiss: Sev'rance Tann
Anzati: Volfe Karkko
Twi'lek: Kas'im
Too bad we don't know more about Darth Gean.
Iktochi: Darth Cognus
Possible competition: Wyyrlok.
I say possible because we never really got to see Cognus at her peak.
Krevaaki: Vodo-Siosk Baas
Togruta: Shaak Ti
Cathar: ... you know, I'm not sure. Sylvar? Rasi Tuum?
Originally posted by Nephthys
Well since she managed to beat Zannah.....
Sure, but we don't know how. If she did something to prevent Zannah from using her sorcery, or assassinated her, or what have you during the final encounter.
Chistori: Desaan
Rodian: Dree Vandap? None of the Rodian Jedi were too impressive.
Trandoshan: Kras'dohk? (None of the force sensitive trandoshans have feats, but he's the only Master among them, and he taught our next candidate...).
Kaminoan: Kina Ha
Zeltron: Chantique, about a match for Jarael and force sensitive (no true Jedi or Sith- except for an unnamed one- among Zeltrons, but Crucible training makes for someone about as deadly anyway)
The general majority of the people who say Talzin>Gethzerion (well, Emperordmb and WildBatha88* at least) never even read the book she was featured in. 😬
Gethzerion is an absolute beast, and one-shotted a post-ROTJ, pre-DE Luke Skywalker. She would be above Talzin, who Sidious didn't think much of off her homeworld.
*I'll let Bantha slide for proclaiming Revan as a god though.
Originally posted by Q99
Possible competition: Wyyrlok.I say possible because we never really got to see Cognus at her peak.