I well remember Sterling bringing Caravelle's, 727's and I think 757's to Luton. Also, Maersk with their lovely bright blue 720's, Condor with I think, 727's, JAT with a range of types, Cyprus Airways with A310/320's, Transwede MD87's to name just a few.
The one thing Luton lacks a little today is variety of aircraft types & airlines compared to the old days