At red lights, my friend Javier tries to race [whoever/whomever] pulls up beside him.
Susan, [who/whom] was in an ugly mood, pushed past a Girl Scout trying to sell cookies.
Noel, [who/whom] I’ve known since middle school, has decided to trade in his ancient Honda.
You should try to impress [whoever/whomever] has a fat wallet.
The Johnsons, [who/whom] everyone in the neighborhood hates, let their noisy dogs bark all night.