Grosse Pointe Blank. My favorite John Cusack film. He has great chemistry with his romantic lead Minnie Driver, his antagonist Dan Ackroyd, his assistant Joan Cusack, his high school friend Jeremy Piven, and his therapist Alan Arkin. This film flows through rom-com, black comedy, and action comedy seamlessly. If you haven't seen it, watch it. If you've seen it, watch it again.
A totally under the radar movie is Love Birds with Kumail Nanjani and Issa Rae. Popcorn meter is only 51% so maybe it's just me. I thought it was hilarious and outrageous, sort of like Game Night.