My suggestions are going to be limited help because I generally am uncomfortable with foods (especially high fat foods,. not that your suggestions are high in those) sitting in a fridge to be eaten that long after. Sure, it’s generally safe, but For Me, 3 days is pretty much the tops. Second, and again, my situation, at my previous job, there was a major deficiency in microwaves, so getting an option to reheat food sufficiently was pretty much a given - so mine were generally all room temp safe (and could be kept at a desk with an chill pack, because a TON of food takers).
Okay, enough complaints, on to suggestions.
Simple mixed greens (no dressing) with a reusable small bottle of homemade dressing (soy-miso-ginger or equally homemade honey mustard vinegar blend) to be applied When serving, to accompany a nice can of boneless skinless sardines. The sardines added a lot of staying power, and were bulletproof in terms of long term storage, and keeping everything apart until the last minute made for better longer-term fridge storage.
Second was very similar in layout to your upcoming plan, Trader Joe’s wheat udon noodles, easy tandoori chicken thighs (thighs marinated in greek-style yogurt, lemon juice, salt, Penzy’s tandoori spice for at least 2 hours, then air fryer broiled for 20ish minutes), with a small bottle of hot sauce, once again mixed at the table as it were.
Last is a bit more work, and again, 3 days MAX, but I really like making homemade onigiri, which is pretty easy if you spend $12-15 to buy a mold. Vinegared sushi rice in a pot, stuff in mold, make a filling out of whatever you like (fridge safe simple picked veggies, teriyaki salmon, lox trim, nearly anything that you sufficiently dry to be honest), gentle pressure to keep it all together, wrap partially or fully in nori sheets or strips, and store for no more than 3 days (best within 48 hours though). Bring a small bottle of soy or ponzu and it’s glorious.