If we're not restricting this thread to 35mm, my favorite combination is Fomapan 200 (aka Arista.EDU Ultra 200), shot at 100, in 5x7 sheet film. Process in Pyrocat HD 1:1:100. I shoot an old Century Master studio camera with a 14" Seneca Whole Plate Portrait (aka Wollensak Vesta). Print in platinum/palladium.