Grodd.... based in the picture, this is the N52 version, who has speedforce on top of his normal powers, making him op. Not to mention there IS an alt future where Grodd kills Thawne before being killed by Future Flash.
Wasn’t this just on DC Universe for their Met-Madness Bracket? Well in there everyone thought Thawne would win... but they aren’t the most trustworthy voters. I believe Nightwing beat Dr. Fate in the championship last year
Reverse flash couldn't just rip out his heart,if that was the case for everyone then reverse flash could kill darkseid (if darkseid's race even has hearts)