St. Andrews #10 is also pretty much a birdie fest.
Kiawah #2 has to get in as probably the easiest par 5.
We can even include one from Oakmont, #17 is a very good birdie chance. Well, we could include it if WGT were allowed to.
Finding 4 par 3 holes won't be easy. I'll take a risk and say Kiawah #17 is an easy birdie as long as you get a half decent tee shot. The green around the hole has very little break.
Another easy green is RSG #17, par 4 again, but anything within 20 feet really should go in.
Congressional #17 is also a good chance, play the approach a bit long and you're left with a tap in birdie.
I need to go play and refresh my memory! Must be getting old.