I was raised believing that the Army Green Berets were the best. My dad was airborne with nearly 400 jumps. Haha, my mom even jumped out of planes like 10 times. Anyhow, Dad was a jumpmaster for the HALO team, served in Vietnam, and did some other stuff in Turkey too. He was a staff seargant when he got out.
Bottom line, there are badasses all over in all of the different units. I think the question is really too broad to be answered correctly. However, I saw a crazy video about the Delta Force, and those dudes are pretty outragous.
