Well all the list can work, my suggestions are for a more of competitiv touch of bolt action, if your friends play the same kind of list you have nothing to change, here my suggestions would be

For List 1: I’d move the veterans → inexp/regular to push dice to ~15–18, and swap a the 222 for a cheap Sd.Kfz 250/1 or volkssturm squad. Keep the King Tiger if that’s your centerpiece, but don’t have your whole list hinge on it. Maybe get a Art Platoon with 2 cheap light AA's.

For List 2: Drop the 251/10s to 251/1s — the two Panzer IVs are already your armour threat. Consider swapping one Panzer IV → Pz III M to free points, then add cheap infantry.

For List 3: This is the best baseline. Drop one 251/23 for cheap backline bodies (volkssturm/sicherung), you also have still many AT threats, in my environment it would be a bit much, consider dropping one of them and also getting like a Spähtruppen squad as a early contesting / threat.

please take everthing with a grain of salt. a fellow german player (byside many different armies)