The Jedi during the prequal trilogy era had some of the strongest jedi of all time, yet they also had the weakest jedi of all time. I mean, c'mon, half the jedi were killed by a small pack of clone troopers following them, and the other half were killed by Anakin in the temple. Jedi are supposed to be able to sense danger, but yet all those that died by order 66 could not sense that their clone troopers were up to something, and even if they did they somehow stood no chance against like 5 or 6 of them. Thats weak. And you would think that Anakin would have been overwhelmed by fighting so many jedi at once...... but once again, they were weak.
But when the jedi were strong, they were very strong. Like Yoda who was the Grand Master, Mace who was the best duelist of his time, Obi-wan who defeated Anakin, Anakin who was the Chosen one, and Qui-gon who discovered how to become one with the force.