I only have a few on my list so here we go.
1. Kyp Durron- apparently he is a beast with power close to Luke
2. Mara Jade- Former Emperor's Hand and poweful Jedi Master. Plus she's hot! (Yes I said that
3. Kyle Katarn- He is a respected master, but I don't know much about him. Could anyone recommend a book with Kyle doing awesome stuff in it?
1. Vitiate- Immortal, but through rituals
2. Nihilus- Almost single handedly destroyed the order. One of very few Sith to accomplish this.
3. Exar Kun- Took the entire Jedi Order to take him down. Then he comes back and puts Luke in a coma.