Something I find weird is that a lot of the main categories for this game are IL's, and should honestly be in the ILs tab. Here are three propositions for full-game runs, and I am willing to do all of these runs myself if you want proof they can be done. All ought to be done from a fresh game, as they recently made an option to reset all your in-game progress.

1. Play all maps. Finish at least one game on every map. This means unlocking and playing every map. Run ends when you finish a game on ballroom. There could be four subsets. Any% Defaults, where you unlock all maps one by one and play on all default game settings. Any%, where you play from the start, but can change the game settings. This means increasing point values to all the way, and decreasing maximum game score to the lowest possible, etc. All settings must be at the defaults at the beginning of the run, and changed to the desired ones after timer begins. Then there would be NG+ Defaults, where you must play all maps having already unlocked them all, and NG+, where you must play all maps having already unlocked them, and may change the game settings. If you want you can make separate categories for different numbers of players, but the fastest way to do this would be 4 local players on the same account, so I don't think it's neccessary.
2. All Unlocks. Starting from a fresh game, unlock all costumes, characters, and maps. This would also be split into defaults and non-defaults. It may also be divided based on how many players, but again, I don't think its neccessary.
3. All Achievements. This is the one I look the most forward to. Starting from fresh, unlock all Steam Achievements. This would also be split into custom and defaults, but since defaults would take ages, most likely only custom would be popular. This would be WAY faster with 4 local players on the same account, so making separate categories for different numbers of players would probably just result in the 1, 2, and 3 player categories being empty.

I hope you like these ideas! I really love the game and feel strongly that it deserves to have some actually decent length full-game runs, and not just ILs. Let me know what you think, and if you want me to submit a run to a) prove these are possible or b) get the leaderboard started off, just let me know

Also if I get no response in a week, I will assume all mods are inactive and apply for mod position :)