I don't know individual people... but on Aege Server:
ONLY GUILD MEMBERS, Only 1 GUILD @ Unique Hunt, no other guild present
First Guild to Kill Isyutaru: TAIWAN
First Guild to Kill Uruchi: GuardianZ (Favorite All Time Guild in SRO)
Other notable guilds for Unique Kills: SpindLe, Gotei13 (Best guild with dumbest name), DreamZ
Check Tavern for some links to videos.
My two favorite Unique Kills videos:
1). XLaw vs Isy. Never saw so many archers before. Great video, back then it took a while to kill uniques, not like today where Yarkan dies in under 2 minutes. Unique hunting was actually fun then.
2). TAIWAN vs Isy. Arguably the strongest guild on Aege then. And a fun video to watch. It was the first time Aege players saw Soul Spear Soul Skill ever from Abay, IPIS, and BOOS. Of course as the name says, all from Taiwan. They all played tSRO and were capped at 80 already, they played on Aege cause they were bored. When 70 Cap came to iSRO, they dissappeared to get to 90 in tSRO again. Errr, they botted.
FYI: tSRO never knew if existed. But lked to a number of TAIWAN players, who said it is not cSRO. Also their servers were 98% bots. Its open bot policy, no policy against botters.
Favorite Unique Kill: Isyutaru killed by lotri on Aege. He was lvl 46. LEVEL!!!! He stole the kill from the level 60 DreamZ and TAIWAN Players!!!
Favorite Back to Back Isyutaru Kills: Ghoststrike @ lvl 52. Ruckus (ME!!) @ lvl 52
And of course 1hp (My Guild on Aege)!!!! Everyone above lvl 75 in 1hp on Aege killed Yarkan. Xiao_xin (ME!!), ettje, Adonia, Vagina, bOon_, BoyBi, Calli, UnknownAzn, INTEL9, Noomad.
Favorite Unique Party: Calli's!!! Everytime I was in Calli's party, someone in the party got the kill. She made the best parties. Calli is now in WoW and never to come back

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And course shout out to ChampionZ Union on Aege. WarriorNation Union
And _l_ to DeJaVu. Hypocritical so called "legit" union full of douchebags. Except eXistence. Rest of the Union _l_