Ooooo!!!! The hell you say? Well, I think I can oblige! There's a Crypts & Things Barbarian class and if you like it you are free to convert your fighter over to it.
Here's the link to the beta rules from the ongoing kickstarter:
https://drive.google.com/file/d/0B9F0pyfarmVieDVCRmJzUUdpeUU/view?usp=sharing
To be completely frank, if you guys are up for it I wouldn't mind converting the game over to Crypts & Things with its swords and sorcery focus and then tack on classes from S&W complete as needed/desired. There'd be a helluva lot less house rules because it's something I'd want to run by-the-book (or very close it) and to your benefit C&T characters seem a lot more competent/likely to survive at low levels than characters in RAW Swords & Wizardry (even though C&T is a derivative).
Just something to mull over before we get much deeper into the game (and if we did convert things nobody would have to start over or anything, all XP would carry over). There would be a few adjustments though: Druids and Bards would continue to use S&W Complete for their spells, but you would have to abide by the 'Color of Magic' rules from C&T, plus there's a bit of an overlap between Rangers and C&T Barbarians, and while it doesn't apply to anybody currently, the most radical difference is that Clerics and Magic-Users get folded into the Sorcerer class.
Look it over and let me know what you think. Nothing has to be decided right now (and I'm perfectly willing to continue along as we are).