There's a few that I appreciate fandom wide ones that I appreciate. Taji and other OCs created by Tajitengu , crazyfoxmimi's Team Star (and gang) and a few others really stand out in my mind. Sadly its dependent on art just because RWBY is so visual. It means I really appreciate it when people try to draw and damn the critics.
I grew up in the Sailor Moon and Pokemon fandoms and one thing I've noticed is that back in those days, the fandom was braver about trying new things. Everyone had a fansite dedicated to their fanfiction or their group of otaku senshi. Even if it was dodgy as sin, it was fun and interesting and unique! There were people writing midi's as theme songs for their OCs, AMVs for their OCs, websites dedicated to art requests , contests for their OCs, lore and history of their OC! So much!
All gone. Its funny that with more professional programs available for free, less people are utilizing them. Everyone says they can't draw, but there's free digital art programs, a million tutorials on youtube and people climbing backwards to offer you bases and resources. Need to write a fanfiction but having trouble organising? yWriter is there to help! Want to make an AMV of your OC? Sony Vegas! Want to make a website, Wix and Weebly are free drag and drops! I grew up on html and geocities. I'd have eaten my own foot for that!
And yet everything gets dumped in a hub. Its more likely to be seen, but more forgettable. because its part of an ever scrolling, ever updating eternity. You guys are great, but there's only a handful of OCs I remember because they're lost in the back pages.