(6)Oliver Wood
(3)Kingsley Shacklebolt
Kingsley is shown to be a badass, but aside from that he doesn't really do that much. I can't specifically remember anything he actually said. Oliver was also a relatively minor character, but I found his personality a lot more memorable, even if his schtick was basically just really really wanting to win the quidditch cup.
(7)Sybill Patricia Trelawney
(2)Buckbeak
Kind of a tough choice, but when it comes down to it, Buckbeak doesn't actually have any lines. Trelawney initially seems like a big fraud (and she is), but when we later learn her backstory, it's pretty cool.
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I made a living on time trial blowing myself off to cross the finish line at ludicrous speed. -transience