Erhm, Hecarim?
He's too strong right now and lacks serious counterplay. He's too tanky and too assassiny right now. His power is undodgeable and you can't kill him either cause he's tanky and fast.
Just make his E dodgeable and/or nerf his damage. He's not supposed to be a better assassin than actual assassins (zed/talon/fizz etc.)
?