This is inspired by @JamesReid860's post where he asked which publisher you'd choose if you could only play their games for the rest of your life.
I'm curious, which designer would you choose if you could only play his/her games for the rest of your life and why? (What is the variation like across his/her games in terms of complexity level? Only gateways? Only heavy weight games? What is the spread like in genre/theme/mechanics explored?)