These ones I'm about to mention are not exactly from the past, but still worth mentioning:
My two favourite trolls on this forum are SIP Mike and Juice Bronston!
But sadly, I don't see them around here often anymore. I'd love to see them both come back, they're extremely hilarious
Another one is Surfer. Except he isn't hilarious, just annoying and repetitive. Hopefully he'll be in the past soon.