There was an alien in the Hitchhiker Tril…err…series, that was immortal and just went around insulting everyone.
Was anybody else surprised by how few posts it took to go from the OP’s “best fleshed out immortal” to mentioning any immortal characters even if they’re drek?
Considering that opinions can vary on what constitutes “Well fleshed out” one can say the divergence began with the OP.
They all died in the original set of books. Eric was killed fighting the forces of Chaos, Dierdre was killed during Corwin’s fight with Brand, Bleys died at Corwin’s side during that battle, Brand was killed, and Oberon bites it while trying to rewrite the Pattern.
Count Saint Germain, from a series of novels by Chelsea Quinn Yarbro (based on a historical character).
And Exapno, don’t feel you need to keep posting in this thread on our account.
I don’t think Oberon died. In fact, I specifically recall at the end of the second series
Merlin rescues Oberon from beneath his mother’s house after he realizes his mother and cousin are trying to control him, and figures out where his father is being kept.
Yeah, he bought the farm trying recreate the pattern.
But I don’t recall the others being killed save for the guy who blinded Eric. Was that Brand?
I never finished the second series, but didn’t Corwin see Oberon’s funeral procession into the Courts of Chaos at the end of the first series? Or was that Dworkin’s funeral?
Oh. As for my favorites:
Maureen Johnson Long (obviously)
Azrafael in the Neil Gaiman/Terry Pratchett novel Good Omens
I think you’re confusing Oberon, Eric’s father with Eric, Merlin’s father.
Sil, you’re right, that was Oberon’s. Dworkin was driving the lead of the funeral procession.
Randal Flagg, the Walkin’ Dude, from many of Steven King’s works. What happened to him in the final Dark Tower book didn’t really happen. I keep repeating that to myself. I know it didn’t happen, because it was just too friggin’ lame.
Again, it’s odd how few female immortals there are (particularly if you exclude vampires). Maureen’s one of the few who comes to mind at all. I wonder if it has anything to do with the fact of how long their gestation period would be or the oddity of a woman giving birth to 90 children over the millennia or whatever.
My favorite comment about Azirophale and Crowley is that “being enemies for 6000 years is essentially the same as being close friends”. (My favorite about Azirophale has to do with an analogy about monkeys and nitrous oxide.)
Tracy Lord and Maureen said it best with Crowley and Aziraphale. Funny, fleshed out immortal characters.
Perry Rhodan 
The one that always stuck in my mind was Alobar from Tom Robbins’ “Jitterbug Perfume”
Eric died at the end of The Guns of Avalon, I believe. Oberon died repairing the rent pattern in The Courts of Chaos. And Corwin, who was a son of Oberon and brother of Eric, was Merlin’s father. If I remember correctly, Merlin never did find Corwin in his pentology. I sure wish Zelazny had written the rest of Corwin’s story for us.
Back to the OP, how about Flagg from several of Stephen King’s books? The only one I ever read with him in it was The Eyes of the Dragon, but I know he shows up a lot. Was he immortal, or just interdimensional?
I’m not. (insert pukey smiley here). I’d also like to push over Heinlein from this pedestal he seems to be on.
And I think Flagg was both, Saltire.
Surely Indiana Jones and his Dad are, judging from the last film. And I disregard those scrofulous nitpickers who say it doesn’t count because they left the Cave.
I think the guy who said Tarzan is right. It’s been years since I read the books, but I think he had multiple opportunities, and that Philip Jose Farmer talks about these in Tarzan Alive!
In any case, John Carter (Warlod of Mars) evidently is. Read the first chapter of A Princess of Mars.
And the princess from Benoit’s L’Atlantide. And H. Rider Haggard’s Ayesha(“She”).
It must have taken me over 10 minutes to write that last post, because I swear ArrMatey!'s post wasn’t there when I started it.