The only completed deck I have that's playable in ranked is Shiranui (now with 2x rinne), but I do really enjoy playing Shiranui so that's not really a problem. I have quite a lot of stuff in the works though, like Luard (because of course), Blaster Exceed, Chaos, and maybe Scharhrot?? Back when Jingle Thuria was still a thing I did play Ahsha though.