MF tele lenses I quiet like Schacht Travenar 2.8/85 mm (a Tessar Clone); Carl Zeiss Jena Biometar 2.8/120mm Exakta or M42 mount, Carl Zeiss Jena Sonnar 4/135 (not fast but beautiful) Exakta or M42, Hugo Meyer Trioplan 2.8/100 (Triplet good portrait lens) Exakta or M42. I admit I have a soft spot for GDR lenses and older obscure german glass, they are not the sharpest lenses but they can give you a distinctive look.
MF Normal lenses I can recommend: Nikon pre AI 2/50mm; Carl Zeiss Biotar 2/58mm M42 or Exakta; Pentax Super Takumar 1.4/50; Industar 50 3.5/50 M42
WA lenses: Zeiss Jena Flektogon 4/20mm; 2.8/24mm; 2.8/35mm all M42 or Exakta mount.

Dominik