I'll second (3rd, 4th, whatever) the 35-105 f3.5. I used a Canon A-1 from around 1990-2005 with that lens as my main walk around lens. Add a 24mm f2.8 (now dirt cheap, I paid $250 for mine) to cover the wide end, combined with the 50 f1.4 for low light, and you have quite a kit.

Dan