is the list of NES (US) games. Here
is the list of Famicom (Japan) games. And here
is the list of Famicom Disk Games (Japan again). There is a lot of overlap so it is not the easiest thing on earth.
As you can see there are hundreds of games that are currently un-TASed for the NES. The bigger question is how many games are left that do not have a TAS that simply won't ever be TASed like sports games, ports on a better console, and games that do not have a final goal.
I am in the process of trying to sort all of these out and have the relevant TAS information in the document but at that many games I haven't even finished sorting out the games let alone put any TAS information in.