I don't know whether it's helpful but when I need some inspiration I trawl the BBC Good Food website. For a month I'd normally have...
4 x pasta recipes (e.g pasta caponata, tuna pasta with courgettes, pasta with prawns, simple spaghetti with garlic, lasagne)
4x curry and rice recipes (e.g. Thai curry, chicken curry, veggie curry...)
4x 'family favourites' (In our house that might be fajitas, steak and chips night, cottage pie, fish pie...)
4x veggie meals (e.g. veggie chilli, halloumi and bean stew, baked potatoes with beans (on a sports night))
4x traybakes (chicken, salmon, sausages with veg...)
4x rice-based recipes (stir fried rice (again, a quick option if DC have sport), paella, risotto)
One night a week we might have a takeaway, pizza or we're out somewhere. Usually I cook enough for there to be leftovers for lunches or a 'fridge night' if we just need a clear out.
That pretty much works for a month. If we like something I'll do it again the following month and we swap in/out different recipes so in the winter we might have a roast once a week; in the summer we might have BBQ/salads etc.