I have a total of 20 100% IV pokemon. My personal favorit is my 100% Snorlax that i caught last sunday while on a trigger run all day. It was the last raid, not even a Mewtwo gym. My best Snorlax ever before was a 82%. I was soooo happy.
Other good catches include Vaporeon, Ho-Oh and Gyarados and Venesaur.
Some of the lesser include a Pidgeot, Beedrill, and 3 Azumarills. The rest of 100%'s are in this category.