1. Forbush Man (Marvel comics)
2. Floyd Pepper (Muppets)
3. Fester Bestertester (various Don Martin cartoons)
4. Ford Prefect (Hitchhiker's Guide to the Galaxy)
5. Farah Black (Dirk Gently's Holistic Detective Agency)
The first four I like because they're generally unfazed by however weird reality gets around them. Farah does get a bit thrown off-center, but she still rolls with it and generally kicks butt while doing so.