Fighters Never Quit
The animated corpse leaves the swamp and heads into Gotham (getting his name of Solomon Grundy from a couple of hobos), becomes their crime boss, and leads them on an attempted take over of Gotham, until Green Lantern (Alan Scott) takes him on (and has problems with Grundy, as Grundy is made of plant material, including wood, which the Golden Age GL is powerless against). Still, Alan and his partner, Doiby Dickles defeat the creature.
This was the only solo Solomon Grundy tale reprinted, in Wanted, the World's Most Dangerous Villains #4 (December, 1972).
And, Then There Was One
This time, Solomon Grundy is reanimated with the use of chlorophyll, by the Professor, who had killed Baron York (his own brother), in an attempt to take over Gotham's gangs. Green Lantern (Alan Scott) is warned by his mystic Lantern, but too late, as he is overpowered by Grundy. Solomon Grundy kills the Professor to advance his own plans and take over the gang, but has become too plant-like, allowing Green Lantern to defeat him by taking away his carbon dioxide, which Grundy needs to live, leaving Grundy petrified in a power ring bubble!
The Revenge Of Solomon Grundy
The JSA find their meeting room ransacked, and realize that it must have been Solomon Grundy, so they go searching for him (and the missing Green Lantern). Each member meets Grundy (except Johnny Thunder), but it was the Golden Age Green Lantern who eventually defeats Grundy, this time, sending him to the moon!
This story was reprinted in Super-Team Family #4 (April-May, 1976) and in All-Star Comics Archives #7 of 2001.
The Case Of The Withered Flower
This time, Grundy appeared to be much smarter than he was before, and could also disguise himself as Dick Cashmere (the long lost son of John Cashmere, a friend of Alan Scott's). Grundy plans to kill John, but Green Lantern defeats him, this time imprisoning Grundy at the Earth's core.
Grundy was picked up where he was left here by Per Degaton, and put in the previous trap he had been, as revealed by Roy Thomas in the earliest issues of All-Star Squadron (to explain that this story had been forgotten about!).
Dr. Fate and Hourman (along with the Golden Age Green Lantern), and it took until his next appearance, in Justice League of America #46 (August, 1966) for Batman to first face Solomon Grundy (though it was more Batman foe, Blockbuster (who much later joined the Suicide Squad), doing that....for that and the second issue of the JLA/JSA team-up).
Robins), and Solomon Grundy got the idea there may be an Earth-1 Solomon Grundy, an idea played out in the Superman titles, with Batman later facing an inferior outgrow of Solomon Grundy in Detective Comics #523 (February, 1983), where Batman ended the menace of the Earth-1 Solomon Grundy in fire.
The original Solomon Grundy continued on in Infinity, Inc., Starman, Green Arrow (and more), and as a member of the Injustice Society of the World, after getting some fame in the 1970s as a part of the Legion of Doom on the Super Friends cartoon show...