You may also be looking for Kolos, a Klingon advocate.

Kolos was an alien business associate of Quark's. He did not think very highly of Quark, calling him as an "obsequious toad."

Kolos participated in an auction in Quark's Bar in 2369, in which artifacts brought back from the Gamma Quadrant by Vash were offered for sale. He was successful in his bid for a Verathan statue depicting Drohlak, paying 36 bars of latinum for it. Quark attempted to interest him in a dagger as a companion piece, but he was outbid by Stol. (DS9: "Q-Less")