Realise this is a bit of an old thread, but could you try giving each of your kids a night to plan and cook dinner for the family? Means they get to see how fussy they are, and takes two nights of planning off your plate, so your plan could look something like this.
Pasta Night- literally any pasta dish
Rice Night - risotto, jambalaya, biriani etc
DD Night -
Around the world night (different country each week even if it's just your favourites on rotation eg mexican, chinese, japanese, indian, thai, jamaican) - fajitas, tacos, stir fry, ramen, curry, jerk chicken/fish and rice and peas
DS Night -
Fakeaway night - loads of recipes online for making takeaway style dishes at home you could take turns picking which one you try.
Potato Night - jacket potatoes, frozen potato products, loaded chips.
You could also change it up, and just cook a protein/main, a carb and two veggies each night, and serve then up in the middle of the table so everyone helps themself to the bits they want.
Monday - Boiled Rice, sticky garlic salmon, green beans and asparagus
Tuesday - baked paprika chicken, Mediterranean roast veg, roasted baby potatoes
Wednesday - Tofu, noodles, stir fried carrots, corn and mangetout
Thursday - Pasta tossed in olive oil, chicken, cherry tomatoes, garlic bread, mixed salad
Friday - ciabatta, oil and balsamic dip, cut cheese, charcuterie meats, crudites and dip
Saturday - white fish in creamy sauce, mash, green veg
Sunday - Roast joint of meat, yorkshire puddings, roasties, carrots, parsnips and broccoli.
There's someone I follow on social media who plans her meals to consistent themes, and at the minute she does:
Monday -Grill/Griddle
Tuesday - Tacos
Wednesday -Soups
Thursday -Crockpot (slow cooker)
Friday - Pizza
Saturday -Breakfast for dinner
Sunday -Pasta
In the past she's also had around the world night with a different country each week.
Or will abandon the theme for a special day (eg national pie day they had pie, super bowl sunday they had traditional stuff like wings)