One word: Pontoon
OK, not really just that ski. It's just an iconic design point. There are lots powder surfing designs - Pontoons, Praxis, Kuros, etc... And compelling hybrids & play skis like '11 ObSethed, S7, Hellbent, JJ, Bent Chetler, EP Pro, etc., etc... and many others...
These skis excel in powder & their designs have a significant impact on "powder technique". In this day of modern ski design, advice based on narrower & non-rockered skis is about as useful as someone telling you how to apply your buggy whip to your car... Get on appropriate skis & go have fun. It might take a few runs to get a sense of them - but we are talking about a hugely reduced learning curve vs old school designs. Go play. Go have fun. Scope it out. Simple as that.
Add to that list the "Line Mothership" My first ever pair of fat skis which improved my powder skiing ability to expert level. These have a rockered tip to prevent tip dive which can occur
with non rockered skis. Good on firm snow too