So it dawned on me I may well be

For example, I will have a protein pancake in the morning, usually with hazelnut butter or cashew butter as a topping (all the nut butters I buy are natural with no added ingredients)

Then during the day I will have a handful of almonds, or occasionally walnuts.

Then in the evening if I have a raging hunger (which happens a lot), I will usually head for the organic crunchy peanut butter for a couple of good scoops.

Health wise, am I over doing it?
If so what makes a good filling alternative?

Can you look at a tree without wanting to climb it or swing from it?

I would ease back slightly, mostly due to the omega 6 content. A better option would be a big salad with some protein and a tablespoon of extra virgin olive oil.

Oats are better for your body. If you enjoy your nuts then why not make your own Muesli? That way, you won't feel as hungry.

Cut out the butters. Have half the amount of walnuts and almonds. Although nuts are good for you, too many are just as bad as eating too much red meat.

I'm always suspicious of the amount of oil floating on top of even the unsalted, organic seed and nut butters, as I wouldn't mind betting it is some kind of added seed oil, such as rapeseed.

Avoid any peanut butter made in America unless you want to bring on a heart attack.

Are you a cannibal in a psychiatric hospital?

If so then yes.

They've already said they only have organic peanut butter.
OP, the best diets are the ones with variety, so you need to mix it up a bit. When you're hungry in the evening, try crudités with home made hummus instead. Or some natural yogurt with a handful of berries.