Of the current living Lizardmen it's Mazdamundi without a doubt.
A Slann of immense power who wields one of the strongest arcane might in the Warhammer World.
Upon his mount Zlaaq he's an unstoppable force.
The best fighter i would say is gor-rok
If Mazdamundi wasn't chronically obese he probably could have stopped the end times single-handedly
What do you think?