My fussy eater won't eat sauces or stuff together - so spaghetti bol, Shepherds pie, etc just don't get eaten.
Our staples are:
Fajitas (wraps, plain cooked chicken - ready cooked or left over from roast, peppers, grated cheese) Self assembly from bowls on the table
Fish & rice with veg ( frozen cod steak cooked in oven in foil with easy cook rice with a handful of frozen veg thrown in 5 mind before the end)
Meatballs & spaghetti (made from scratch if can be bothered but also have frozen meat ones and frozen Quorn on ones for variety!). With ketchup on the side for DS as won't have the sauce!
Pasta with frozen veg and strips of ham and grated cheese.
Tortilla pizzas, DIY - tortilla wrap, spread with tomato puree, sprinkle withave grated cheese, add toppings of choice (or favorites are chopped ham, chopped cooked chicken, frozen sweetcorn, chopped pepper)
Other staples in my freezer are sausages (Quorn and meat), cod fish fingers, salmon fish cake, breaded chicken mini fillets (rather than nuggets). I just alternative between rice and potato wedges with them!
Home made potato wedges (potato cut into thin wedges - half then half again and half again, sprayed with oil and cooked in oven) also popular.