Since I don't have a nr1 favourite, I'll give my top 5
1. Sam Rockwell, especially in Moon and the Green Mile
2. Norman Reedus, Boondock Saints ('cause Death Stranding isn't a movie, unfortunately)
3. Jeffrey Dean Morgan, Watchmen
4. Heath Ledger, A Knight's Tale (and yes, also Brokeback Mountain)
5. Jake Gyllenhaal, Enemy, Demolition and Jarhead