If WWIII should intervene between now and 2045, I'd say Simon Armitage has an excellent chance of having some of his work survive:
http://www.michaelmelvin.co.uk/stanzastones/
Edited in: Or even if there isn't nuclear war. But he'll have less competition if there is. Feeling a bit pessimistic this afternoon. I can just imagine warheads being aimed at libraries, given the popularity of certain lines of belief nowadays.