Even Coast Guard has elite pilots. Flying the coolest aircraft in any of the branches is very competitive as is going to one of the more advanced pilot schools (like Top Gun) or making it on a team like the Navy’s Blue Angels or Air Force Thunderbirds.
Some Marine and Navy pilots are landing and taking off from Carriers which is hard. But AF and Army pilots do some challenging jobs as well.
We trust Marine pilots to transport the president in helicopters and Air Force pilots in Air Force One.