Strongly disagree with a .22 pistol - that's a fun gun. A rifle is for hunting & self-defense, in any caliber.
Just five, eh?
1. Shotgun (pump or semi), 12 ga. Preferably with 2 barrels (one hunting & one self-defense).
2. Rifle, rimfire - turnbolt, lever, pump or semi, .22lr
3. Defensive & multi-purpose handgun, preferably in 9x19, .38 super, 9x23, 10mm, .45 acp., .44 spec., .357mag, or .45 colt. Can be revo or semi pistol.
4. Centerfire rifle in "full powered" bottlenecked caliber, preferably a turnbolt - anywhere from .243 to .30-06.
5. .50 cal muzzleloader; preferably a Savage 10ML, if legal in your state to use for hunting (if hunting is included), OR a combo target & self-defense rifle - an AR15 or similar with a 20" HB, in 5.56x45mm / .223 rem (if hunting is not included)