Dark Pheonix (Jean grey) Controls all matter down to atomic level... the force... win for jean grey. Just so you know i'm not on about the movie one i'm on about the comic one cos movie pheonix was a pussy.
But the whole idea of the jedi doesn't work for me. To much crap happens that doesn't seem to build them as indivduals. Mace windu got done by a cheap shot, yet the force gives him vision a bit into the future, so surely he saw it coming.
But in most 1 on 1's a jedi would win. When you think that a jedi can move objects with their mind, they could easily hold anyone up in the air without any retaliation and stick a saber in their gut. Gordon Freeman, lose, Duke Nukem, lose, Jack Sparrow, lose. I even think the borg would lose, but its more about the character. Jedi only kill if they have to, they aim for peaceful resolution first, so would they attack the borg. As has been mentioned if the borg assimlated a jedi, game over, stop the borg with force.
Its easier to just not go into jedi cos of the light side/dark side thing. The Borg would surley fall to the dark side, but then would they turn against eachother? i know they are one concious mind, but would the force seperate them... ooo my brain is dripping out of my ears...