Peter Gibbons in Office Space.

Heath Ledger's joker.

Korben Dallas - the man just wants to romantically live out the rest of his life with the ultimate weapon, without people sticking guns and microphones in his face. I can relate.

[Edit for spelling]

Martin Blank (Grosse Point Blank)

Ends up in a job that just feels like a grind, can't stand pointless mundane life though.

Hits mid life and Has to find a new way.

Hazel from Watership down. A normal dude who had to step up and lead a bunch of refugees against all types of obstacles external and internal.

Joe Bauer from Idiocracy