Zig-Zag!
Smash Lord
I think...Taj had a good pika too.Vidjo's pika was good. He just doesn't play him anymore, like ever, to my knowledge. Maybe in the occasional low tiers, but i'm pretty sure he's given up the rat.
Azen is amazing and also retired. He's my favorite pro pika who doesn't main him, regardless of whether his is the best any more.
There are a lot of pro players with good chus. Vidjo, azen, m2k, chudat, pc, to just name those i've seen. This list just gives credit to those who devote the majority of their time to the rat. Anyone interesting in picking him up can look at this list and say "oh, n64 probably knows what he's talking about when it comes to pika" and get advice from them. Not to say the pros don't deserve credit, they just don't play pika in tournament enough for us to really get a grasp on different aspects of their pika game.
But I learned something from playing Azen, in that he isnt really great with pika. He's just great. And that carries over tremendously with any character. For example, while no match for Jiano or Isai or Dark, Tink's falcon won a finals set once. Does he main falcon, or play him much? Hell no. But he REALLY knew what he was doing.
But in a ditto by one of the best, he'd get owned. And all of the intuition IVE gained in years of pika play during important matches is completely unique to myself, and the few that do main chu.