Tabac, the soap that got me started in shaving. Easiest to lather with no practice or experience.
So far, it'd be a toss-up between Mama Bear's and Honeybee Spa...
I have to tell you gents I am a newbie to wet shaving. Today I tried Tabac shave soap. I did a lot of research on this site. With my Mulhe R41 ( a razor I was questioning myself for purchasing before using this quality soap) I got my best shave to date. The R41paired with a Gillette Silver Blue and the sick lather of Tabac makes superb results.