I'll exclude the Force entities, otherwise the list would just be them. So this is about what I'd say the strongest mortal Force users are, off the top of my head.
#1: Sarasu Taalon
#2: Luke Skywalker
#3: Darth Krayt (Prime)
#4: Darth Caedus
#5: Lumiya
#6: Shimrra Jamaane
#7: Darth Sidious
#8: Jaina Solo
#9: Kyp Durron
#10: Kyle Katarn
#1: Sarasu Taalon
#2: Luke Skywalker
#3: Darth Krayt (Prime)
#4: Darth Caedus
#5: Lumiya
#6: Shimrra Jamaane
#7: Darth Sidious
#8: Jaina Solo
#9: Kyp Durron
#10: Kyle Katarn