Actually, there is no such thing as a choice-locked sweeper. In rare scenarios, choice-locked Pokemon can potentially sweep a team that didn't prepare for it enough, but this does not necessarily classify them as sweepers.
Every choice items creates a specific role for the Pokemon wielding it, and sweeping isn't one of them. Sweeping can however become their role in a match by random if they happen to be able to plow through or certain team, but this is more commonly referred to as cleaning, this separating these 2 concepts is of vital importance
As you have clarified yourself, choice scarfed Pokemon tend to be revenge killers, but in the list below, I will clarify what common roles are produced by the choice-items
- Revenge killers
- Offensive Pivots (When used in conjunction with U-turn)
- Special / Physical / Mixed attacker
- Glass Canon
- Attacking Lead
- List item
- Special attackers
- Physical attacker
Choice-locked Pokemon are usually not designed to be sweepers, and despite the possibility existing of them assuming the role, they usually serve the above.