Only one I believe that is REALLY underrated: (On how I look at things)
SiLviA (EXTREME mouse skills, Can spin like crazy on a mouse, a very hard skill, one of my first inspirations)
Mesita (Also an EXTREME mouse player)
K i R i K a R u (Fantastic Player, one of my inspirations when I started playing)
Remilia-Scarlet (Highly Fast Streams And Awesome At Many Other Skills)
Uan (Another One Of My Inspirations, And Also Seen A Lot Of His Replays, He Is Crazy Good)
TTTL (One of the first people I've seen that blew my mind, Can play very high bpm and also has a lot of skill that people don't even know about)
ShaggoN (My god, his accuracy is LOCO, my very first inspiration
)
Dungeon (Can play very fast songs, HARDROCK master, A LOT of potential)
There is a lot more.....but my brain is fried right now