Cella Extra Extra Bio is my pick.
Classic Palmolive in the green tube is surprisingly goodEuropean Palmolive in the green tube. Cheap, smells great, slick as goose snot.
I was going to suggest prorasoI have only tried four creams SR shaving. Palmolive Regular (Italy) is the slickest, including residual slickness. Just behind that is Proraso green but that also lacks the residual slickness of the Palmolive.