Conversation so far:
What is the Ruthless Roundtable?
Kozlov began an angle with Ezekiel Jackson.
what was his angle?
after one of them had easily defeated a local competitor, the other would come out and execute their finishing move on the fallen opponent in a game of one-upmanship.
Did this work for them?
the team of Kozlov and number-one contender William Regal.
Jackson turned on Christian, forming an alliance with Regal and Kozlov.
Was there a storyline associated with this feud?
Kozlov and Jackson aided Regal in his feud with Christian over the ECW Championship, but Regal was unable to capture the title.

Question: Was there anyone else of note involved?
Self-contained rewrite: Was there anyone else of note involved in the Ruthless Roundtable other than Vladimir Kozlov, Ezekiel Christian, and William Regal?