I do think they exist because a lot of professional talk about it and Mookirah talks extensively about it in his guide about different skill levels and how to become a professional Smasher. Personally, I think it's impossible to constantly keep improving and there will be when you get stuck in a rut and simply stay the same or even get worse for periods of time.
You do have the best ROB that I've played but I've played a lot of good ROBs. One of my rivals, goes by fallcrowe, plays a killer ROB too. The characters he plays as are Metaknight, Snake, Captain Falcon, ROB and Toon Link with his best being the first two, especially Snake. I'd love to introduce Aryman to him because I think he'd give him a huge challenge. There's two things that I've copied from him that I love using with my Snake, short hopped dairs and reverse full hopped nairs. Overall, he's probably one of the best players, period, I've ever played.
Add in:
19 spots are still open; if you guys have friends/family/lovers whatever that want to join, they are more than likely to.