Rory D Nelson
It's hard not to like a western (at least for me), especially when the main character is a "man without a name" badass. Throw in an Arthurian legend-tie in, so the gunslingers are knights on top of everything... well there you have an action-packed book!
If you like this, you'll be pleased to know the Hound of Hell dark fantasy series lies within the author's Brotherhood of Merilin universe. If you like Arthurian legends, dark fantasy, action, and complex characters, this is the adventure you've been craving.