Choose a potato texture that can survive the mixing bowl
The practical target is not a special potato so much as a controllable one. Yukon Golds give a creamy middle, red potatoes stay a bit firmer, and russets can still work if you watch the boil closely and do not overhandle them afterward.
What matters more is stopping at fork tender instead of pushing until the cubes feel fragile. If the potatoes are already crumbling in the colander, the dressing stage will finish the damage for you.
Salt the cooking water, drain the potatoes, and leave the surface starch alone. That starch helps the dressing grab on without forcing you to overmix.


