This question works on a few levels:
1) How do you define a "classic" camera / lens?
2) Which film cameras / lenses are, in your opinion, classics?
3) Are there any "classic" combos.....?
I'll refrain from offering my own view of the definition for 1) and 3) so as not to try to steer people in a particular direction. However, as far as 2) is concerned, I'd have to put the Hasselblad 500c/m at the top of my list for MF and suggest that the Nikon F2 would be my choice as a classic 35mm SLR body. As far as lenses go, I love my 35mm/f2 AIS Nikkor and also the Canadian 50mm/f2 non-ASPH Summicron I had when I owned my M6.
It's a tough one but there's so many options: i.e. toy, instant, miniature, half-frame, 35mm, MF, large format, rangefinder, SLR, prime, zoom, wide, telephoto, home made, etc, etc.....
Of course, there's no right or wrong, but it'll be interesting to see the list.