The only such thing that I am personally familiar with is Weight Watchers (I joined several years ago, took off 40 lbs in about one year and I have had no problem staying at that weight for a couple of years since) and I’ll highly recommend that. I’m sure that you can find their food info out on the web (you can join online at their website) and there’s nothing complicated about their dietary info/recipes. In my opinion it’d also be worth paying for a few weeks’ membership, go to some of the meetings, you can buy cookbooks and whatnot too (although I’m sure you can get them at any big bookstore as well).
They’re very big on what they call “filling foods” which are just foods with low caloric density. Soups tend to fall into this category because you’ve got lots of veggies and water. Soups and stews also lend themselves to the kind of bulk prep you’re interested in; you can make a large pot of soup, divvy it up into smaller tupperware containers and pop them in the freezer to be used later.
I have never felt that I was starving myself or that my diet was limited. It did take about 2 weeks to get used to the (relatively minor) changes that I made to how I eat but it’s just second nature these days.
FWIW, there was a big study of successful weight-loss methods in the US recently, success being related to how well people were able to lose weight and keep it off long-term. WW was ranked something like #2. Top place was, I believe, “do it yourself” (i.e. not any particular commercial method - good if you are very self-motivated).