3. Shotgun- This weapon is usefull for close battle i use it in my base when i start but i dont reccomend it to use it later zombies get stronger and weapon is no more efective.
2.Flamethrower- Very good weapon can be used at start and kinda later.
1.Sniper- Not that enfective at start bc at start there are not many zombies, his power is to kill more zombies at one and its one shot kill. I reccomend to use it later in ur base bc u can kill a lot of zombies

Sorry for my bad english im working on it. Thank you for reading this hope this helps you!