Thief and Collateral are his peaks for me. Good double bill too since they both work as examinations of highly skilled criminal pros.
the ending to thief is perfect:
The Insider probably his most underrated work. Public Enemies is his worse. It’s got an insane cast but it’s completely forgettable. Blackhat is messy and he keeps editing it without telling/releasing it properly but it’s got a little bit of his sauce still.