Talion: Revenant

the fantasy books out there feature some sort of "Hero" of the story. But there are a few books that really do the hero conceit some real justice, either looking at the price of heroism or just telling an outright killer story. I've recommended a few books here that will suit your taste if you like the flavor of Talion.

Once a Hero is another book that focuses on the cost of being a so called "Hero." It's a great read and while not as good as Talion: Revenant, should certainly be read if you enjoy Stackpole's book. 

If you like vicious fantasy with a lot of focus on a bad-ass main character, Heroes Die fits that particular bill. The protagonist is about as deadly as they come and, like Talion: Revenant, combines vicious action with an addicting plot. Another heroic fantasy tale worth reading is David Gemmell's Legend. Legend really sets you in a brutal world where only one man can make it right -- Druss the aging and retired hero. Quite a few of Gemmell's other books explore the idea of heroism quite extensively as well, so if you want more of the same, look at his other work.

For a fantasy that centers around the exploits of a hero (a trilogy though and not a standalone) , check out The Name of the Wind by Patrick Rothfuss. This book has been lauded by critics and readers alike for years as one of the best heroic fantasy tales in the genre.