Mandalorian Vs. Chiss (Patreon)

I'm a long time Star Wars fan, casually I'll admit.  I've always enjoyed the setting and lore but I'm familiar with very little of the now abolished extended universe. To that extent, I'd never really heard of the Chiss until recently, with the introduction of Admiral Thrawn in the Rebels TV series being my first encounter.  Are there any other major Chiss characters besides him?   They look pretty cool as far as alien races go. They strike me as quite vampiric in appearance.  Is there anything unique to them biologically or are they pretty much just blue humans with scary eyes?  If you know feel free to fill me in. :)