obi wan would lose hands down, as much as obi-wan is one of my favourite characters from the movies, be realistic, not even a match.

yoda doesn't luck out, he is aware of everything going on yoda actually does win according to the base cgi fight scenes on the bonus discs, if you've seen the blu ray deleted scenes. It would've made little sense to show the emperor flee through the roof AFTER he realises he can't defeat yoda, and then have yoda flee from trooper fire. i think in that moment of pushback during the battle with sidious yoda forsees the future, the force implosion must've caused a premonition or something as for yoda vs exar kun, my votes on the little green guy

Mace Windu felt fear and that became evident to the emperor, ie "he's too powerful, he has control of the courts and the senate" anakin was the chosen one as for Yoda, are you kidding me? Yoda actually beats Sidious and Sidious then high tails it through the roof, deleted scenes that were reworked into Yoda leaving after seeing a force vision/premonition at the end of his battle with Sidious, during the pushback. his failure was evident but subconsciously he knew what he was doing. I would count Revan above Satele Shan or Luke, Yoda is in another league.