i'm not going to evaluate skaters like midori and surya since i was little when they skated, so i will do the ones in recent years. my best:
yuna: fast, BIG, fearless jumps. she flies into them and is so consistent and has hard content minus the loop.
mao: very light, high jumps. she floats and makes them look so easy.
caro: very powerful, also fearless jumps for the most part. very big and lovely air position.
rachael: i know a lot of people wouldn't agree, but she is (was

) very consistent and "reliable rachael." she always delivered and almost never fell or pop and made jumping look easy.
gracie: for obvious reasons. big, floaty, effortless jumps with perfect technique. consistent for the most part. difficult jump content also.
adelina: she is fairly inconsistent, but when she hits they are gorgeous. nice and big.
julia: again, not huge jumps, but consistent and nice to look at.
liza: perfect technique, SO consistent, hard jump content.
ashley: i have always been a fan of her feet in the air, they are very neat and her jumps are good sized. they've become much better in the past couple years with her improved consistency.
agnes: inconsistent but very powerful and huge jumps.
courtney: like someone else said, huge but dirty jumps. they need major polishing but they are HUGE.