I quit using Chamois Butt'r because of the scary chemicals, but I found Beljum Budder irritating - especially when it would work its way inside after a long ride.

I looooove shea butter. It only takes a little, lubricates spectacularly well, doesn't mat the hair like petroleum products will, and lasts a long time, even in the wet - mostly washes out of my shorts and the residue doesn't cause a problem, doesn't stain, non-irritating, one natural ingredient.

Some people use pure coconut oil. The melting point of that is too low for my preferences (especially when it comes to trying to carry a backup supply in a pocket), but YMMV.