Heat with Al Pacino and Robert deNiro was an excellent movie, deNiro's the high-end bank robber and Pacino the cop
Brooklyn's Finest with Richard Gere and Ethan Hawke about corrupt / disinterested cops was a very good movie
Copland with Sly Stallone, also about corrupt cops was good
And that is all I can currently think of!
Hope it's helped some...
:)
In addition to those movies End of Watch is not a bad police movie it is supposed to be somewhat more realistic than other movies.
GOOD COP MOVIES.