The Prisoner (for me greatest tv opening just beating Mission Impossible)
Mission Impossible
The Avengers
I Spy
Sanctuary (opening credits of series 3-4)
Stargate SG-1 (closing credits)
Department S
Danger Man
Man In a Suitcase (by Ron Grainer who also did Doctor Who, Omega Man, and The Prisoner)
Doctor Who
It Takes A Worried Man (Ron Grainer)
… and pretty much all from the above posts, sadly most of those shows are very old. Getting nostalgic cos I’m old.