I'd really like to use different spies as well. Let's not forget the great sixties, now shall we?
McGill,
Man In A Suitcase:
John Steed,
The Avengers:
John Mannering,
The Baron:
Jason King,
Department S and
Jason King:
Harry Rule,
The Protectors:

Note: I know, I know. Robert Vaughn's post-Solo career.
David Callan,
Callan:

Note: You probably know him better as Robert McCall of
The Equalizer
These are what I suggest for now.