Well, hear are some more imortals to your list:

The Endless (The Sandman. The Dreaming. Vertigo comics line from DC).

Unkcle Sam (DC Comics, Vertigo Comics. Living personification of the United
States Of America. As long as USA is living, so is our unckle, but he does
change with the times).

Mr. Wicked, Miss Maragold, and Mr. Heroic (Created by myself, thay are the
personifcation of evil, victom, and the heroic ideal, respectivly. As long as
man is evil to man, and man is good to man, and that men are harmed, thay
exist. Sounds like thay should be in Doom Patrol, nee?)

Well, hope you like it.
BlackStan.

Oh, one more imortal (?)...
...BlackJack. He apears in his onw manga series (and anime), and has also
apeared in Fierbird 3030 (same name and design, but without the patchwork
skin, and wearing a difrent costume, but he is thair. Sometime in the futer,
he discovers medical imortality, be it cloning, brain transplanting, combo of
both, whatever)