From top to bottom and left to right, here are my guesses as to which is which:
Gandalf, Legolas, Gimli, Boromir, Aragorn, Frodo, Merry, Pippin, Sam, Gollum. I’m assuming Sam is holding Sting and Frodo is more out front I would guess, although I don’t see a chain with a ring.
This was made by the comic book artist Mike Ploog.
This is some of the first artwork that does a good job showcasing why all the other characters in the book keep thinking the Hobbits are just children.