I think the meta is Thief Rogue with two hand crossbows. Using two lets you shoot the offhand with a bonus action, Thief gets two bonus actions, so you can get three attacks. Granted only one will have sneak attack damage. You can buff the attack damage with Sharpshooter for -5 to hit and +10 damage, which is very nice if you have advantage. If you're using one bonus action to hide, then you still have two attacks.