Solomon Grundy is essentially an immortal killing machine. Sure he's always wearing pants that don't quite fit and he talks like Jar Jar Binks mentally challenged younger brother. But dude has the power to bitch-slap three Justice Leaguers in the chops - - at the same time!
How come he's never made it to A list bad guy status?
Answer: This one time he went to Earth 2 and got beaten by the Justice Society's patented 'Tiswas' offensive:
It's good to know that when Earth 2 is menaced by the unquiet dead, zombie armageddon can be averted by a well-armed Krusty the Clown.
(Today's nod to the Phantom Flan Flinger was brought to you by Justice League of America v1 #47. The conclusion of an epic two-parter that features the Spectre keeping Earth 1 and Earth 2 from colliding by jamming his body between them and having the Justice League punch out the dastardly Anti-Matter man while standing on his ass.)