I know you asked for recipes for one person, but when I was in college, I had an apartment with three roommates. We each picked a weeknight to cook for everyone. This allowed us to have a variety of meals, and you only had to cook one weekday (weekends were catch-as-catch-can). We also did a group shop and kept a running shopping list.
Another group of friends liked to cook on weekends, then eat throughout the week. You could do this with a slow cooker, or do food prep and freeze/refrigerate. Obvious choices are chicken noodle soup, chili, spaghetti sauce, and so forth. Along this same vein, getting a larger package of ground beef and cooking it up, along with diced onion, would give a great start to many meals from tacos to pasta, and could easily be divided into meal-sized containers.
Another thought, not so much on one-person meals, is I made each of my children their own cookbook. These contain recipes for "my" meatloaf, "my" roast chicken, and so forth. That way, they have their family favorites. I also added kitchen tips and humorous notes--like, along with my mom's famous pie crust, I added the confession that I, personally, never mastered the famous crust, so I use store-bought!