For inside HPA areas,
*silicone oil or grease
*Dow Molykote 33, 55, 111
*Krytox 205 or 206
Outside, trigger and barrel
*Ballistol
*Slip 2000
*Remoil
*moly grease
I mainly use Ballistol for most things because it's safe and works fine, even on wood.
I tend to use plain old silicone grease on internal orings, it's cheap and works.
Sometimes I use a tiny amount of moly grease on threads of bottle adapters to lube them up, but only if they're outside the HPA areas and only a tiny amount.
If I feel something metal inside the HPA area needs lubed, I'd use MolyKote or Krytox, but I've not found anything yet that really needed it.
Of the Molykote variants:
33 has some use on metal, so would be a good internal lube and lots of airgun manufacturers recommend it.
55 is only for rubber to metal, and will slightly swell orings, this is not a bad thing, use it with confidence.
111 is just plain old silicone grease, like vacuum grease.