Obi Wan vs. prime Grievous

Kenobi is stated in many sources to make it a "no contest" for the cyborg. In addition, the fact that he outright dismantles the general when he draws upon his full powers and changes his usual strategy of winning by outlasting the opponent to that of sheer domination by aggression( to the usual skeptics-please understand, not a random shift in the battle, but a conscious decision on his part), he pretty much stomps him based on three primary sources( novelizations), and all of that corroborates at least 4 to 5 secondary sources stating that Grevious was "no match" to Obi Wan

Also, the ROTS novel explicitly follows the LoE continuity that has Mace battling Grevious blade to blade, not force crushing him, and I rate that achievement of the General more highly than any other achievement that he has so, all in all, Obi Wan stomps