Non accounted to player limit permission.

Hey, I'm not looking for a plugin to bypass the player limit as we use that already. I'm looking for a plugin where I can apply a permission to a player/group of players and they don't increase the player limit.

Example:
10 players online with a 15 player limit, 6 players are in the default group, other 4 are in a higher group with perm to bypass being counted by player limit, so the server only shows 6/15 online on the player list, keeping the limit down.

The reason I want this is so that a group, such as staff doesn't get counted to the limit, allowing more standard players to login before hitting limit.