I'd read Martin before Erikson. Erikson is very dense and employs the tropes and cliches of the fantasy genre in an interesting way (as does Martin, but his style is more approachable). Or to put it another way, it's easier to read Erikson when you are familiar with the fantasy genre and what makes it tick. So I'd read GRRM before Erikson. I wouldn't bother with Marco as he's just dull and cliched. Elliott is reasonably good, but her series comes across as a lightweight version of GRRM's series, so I'd leave it until a way after (it does have the benefit of being complete though). Williams is pretty good, nearly as good as GRRM, and it's complete. It may be more worth your while to read Williams before GRRM, actually.
Leave Hobb until last. She has more books than anyone else on the list and you can go through them whilst waiting for Martin and Erikson's new books
Good to see another fan of Peter F. Hamilton as well!