Basically Fergie's Man Utd is what I'd class as good football. Quick, incisive and getting crosses into the box, etc. Similarly Keegan and Robson for us. Alongside that, he knew how to mix it in Europe to get the results through more workman-like performances (utilisation of Ji-Sung Park).
Wenger's Invicibles were of course the ideal, you need the talent to back it up though.