Yes, there are decent ones, but you only find out which ones are OK (and which you like) by trying them. That takes time, but other people's recommendations are not always what you like yourself.
One that I had half of yesterday, and will have the other half today, is Iceland's "Hunters' Chicken" It is a pack of 2 chicken pieces in a very tasty sauce, exclusive to Iceland from Slimming World. There is no potato or veg with it, so you have to also bake a potato, or microwave frozen mash (Aunt Bessie, M&S or other supermarket, very easy and pretty good) and some frozen peas or similar.
You don't have to go to the pricey websites like Cook. Most meals from M&S are excellent value for money. Tesco have meals at varying prices and qualities (their "Finest" range are the best) so do Waitrose and Morrisons. Iceland have some really nice things, and also some budget meals (for instance, bangers and mash)
Neither do you have to get whole meals - the supermarkets have things that save you time and work, but can be used with your own vegetables, or the pre-prepared veggie packs and microwaveable frozen rice or potatoes or steak-cut oven chips.
Experiment a bit - and keep a note of what works. You think you'll remember, but you forget weeks later when standing in the aisle with your empty trolley.