Any decent short barreled pump would do great, especially fitted with an extended magazine tube [for plenty of ammo] and a good super -bright mounted light [to nearly blind and allow for positive target identification].

Two shots from a double barrel might not be the best medicine for 2 or 3 perps.

And we all know that just THE SOUND of a pump action being worked puts fear into criminals. If you can scare them off, hold them at gun point til LEOs arrive or just basically don't HAVE TO actually shoot anyone or discharge the weapon, you'll be much happier in the long run - beleive me. Lawyers cost money and you will wind up needing one if someone gets shot.