1 long arm - Mossberg 590A1 With light and bayonet mount. This weapon holds 9+1 rounds internally (12 Ga. 2 3/4 Shells), and with a side saddle and speed feed stock you can more than double that for 20 rounds on your weapon before you need to look for more in your pockets.
1 handgun - Springfield XDM 40 S&W with laser sight. This weapon ships with 2 stainless steel 16 round magazines, that's a lot of firepower for a comfortable and portable .40
1 melee weapon - Aluminum Baseball Bat
1 last ditch weapon - Small Hatchet with hammerhead. Firemans tool is perfect for this and can be reversed, extended, Butt of the handle is an extendable crowbar tip, also good for downward stabbing when not extended and used for crowbar. etc.)
3 EDC items - Tactical/utility light, probably a mid sized Fenix, Multipurpose survival knife or bayonet, Multi-tool (such as a leatherman).
Basing my weapons on Zombie characteristics, i.e. need to basically brain them to kill them. Both the shotgun and the .40 can brain a zombie with one shot close up. Laser sight on the .40 helps with longer shots where more accuracy is needed.
The bat is light but can brain a zombie within several hits. I'd prefer a heavier one, but for carry purposes aluminum wins out slung over the shoulder for those low ammo situations.
Last ditch is good for close in fighting and also for survival. Small hatchets aren't too heavy, Firemans tool is really nice to carry, and easy to strap on. hammer side is useful for fight and survival, hatchet side can split open zombie brain cavity (hammer to mush out contents).
Basing my choice of EDC's and last ditch on the need to survive and break into buildings for food and supplies.
p.s. I disagree with .22 rounds being effective, you have to do a lot of damage to basically kill something that is already for all practical purposes dead. Zombies will continue to attack even while being stabbed and shot with broken bones. A 22 would kill a normal person with a headshot (sometimes) but probably wouldn't phase a zombie unless two or three shots connected, you really need to remove or puree the brains which a larger caliber will do better. remember a crowd of zombies can attack you at any moment, how many shots do you want to use for each one? Now in a non zombie survival situation, I think a .22 lr outfit is worth talking about.
(knives are useless, swords are good though for decapitiation. Much easier to just bash the heads though for melee).
I'm glad we had this talk.