I can't believe you haven't read The Road. It's the worst book I've ever loved.
Yes, Blood Meridian. It's the only McCarthy I've ever attempted. I didn't finish. Even though his prose can be enjoyable, the violence just became tedious after 200 or so pages, and the diminishing returns began to mount. If it weren't for me being stuck in a jury sequester room with no other way to block out the morons whom I was jailed with, I doubt I would have even gotten that far.
You should at least give No Country for Old Men a try especially if you haven't seen the movie. It's a lot more compelling. The Road is great but gods is it a sorrow read. Don't feel bad, I couldn't finish Blood Meridian either. McCarthy is a great writer but when he writes a two page long sentence about a sunset my mind just vaporlocks.