Any suggestions for artisan soap makers in Europe?

You mean with that citrus based soaps can be a little more irritating to the skin than other scents? Regardless of what is the base of the soap?
 
Abbate y Mantia

Very understated and their Krokos is up there with the shaving Gods

A big plus for Signature Soaps. Londinium is possibly my most used Soap of the lot.

Another MDC fan and as pointed out, ain't cheap but lasts forever.