Kenobi defeated Anakin, a stronger, faster and overall better Djem So duelist than Bane. This shouldn't be argued. Anakin was basically equal to Mace who was second to Yoda at the time of ROTS, and at the time of AOTC, was probably better at dueling than most jedi.
Kenobi is called by Mace Windu, the greatest master of Soresu.
This is usually forgotten, Kenobi can actually put up a good offense, as he is a high level practicioner of Ataru. He also had advanced training in Shii-Cho, Niman, Shien, Jar'Kai, and Tae Jitsu.
Kenobi likely had the strongest Force Push of the council, and although he was slowly being overpowered, he was able to match Anakin's rage boosted one for a significant amount of time, and eventually was blasted back, along with Vader.
Kenobi has the capability of tutaminis (the original CW cartoon) though Lightning absorption seems out of his ability besides absorbing it with his lightsaber.
He used saber throw, Repulse, and could use the force to make sounds like the roar of a Krayt dragon.
Kenobi is seriously being underestimated here.