I don't want to appear rude, but it sounds like you should just get a job which allows you to be innovative and creative, possibly in someone else's startup. Without effective marketing, you're never going to build a decent sustainable business, and (to me) you taking the view that it is something you don't want to have anything to do with, means that is exactly what will happen.
Alternatively, as per James's suggestion, if you have some sound innovative, creative ideas that you can develop, find a more marketing oriented co-founder who will care about all this stuff. But don't think you can just ignore it - in a strange way, everyone in a start-up is selling whether they understand it or not.
(Hoping this doesn't come across as too patronising...)