We think the Giants should take a quarterback at No. 2. Josh Rosen probably. Eli Manning isn't getting any younger. But the Giants still like Manning, and they have a need at defensive end. So maybe Bradley Chubb is the pick at No. 2, though the Giants could surely trade down to No. 5 and still get Chubb there, if they want to go the non-quarterback route.
Let's presume Darnold goes No. 1. The Giants (or another quarterback-needy team) could take Rosen at No. 2. It's pretty clearly that Darnold is the best quarterback in this draft. The other three guys are clustered behind him.