I havent used all these, so your milage may vary, but I was looking for a similar thing not long ago. Https://www.backloggd.com Https://rawg.io Https://wetheplayers.com Https://www.grouvee.com/ Https://gamelib.app/explore Https://backloggery.com/ Https://playnite.link/ There's also just using a spreadsheet, or Notion with a good template. Source: about 1 year ago

Howlongtobeat.com and then filter by your desired length and sort by rating or popularity. Source: 6 months ago

Overall, I would say that Mario Wonder was good, for those reasons. However, that's about all the game has to offer. For starters, the scope of the game is very small. Especially considering the $60 price tag. The game only me around 10 hours to beat, or about 18.5 hours to 100% according to howlongtobeat.com. Source: 6 months ago

Ive got a big backlog of games to play, so what I did is for the singleplayer stuff I looked up everything I had installed and seen how long it would take ot beat it (I used this website https://howlongtobeat.com/ ) and im playing the shorter stuff first. I had to kind of force myself at first because ive been really distracted myself lately its a huge issue at times. My main thing was youtube, id just randomly... Source: 6 months ago

I would suggest splitting the short games and long games into two separate lists, order them based on how much you want to play them, and only pick out a long game when you have the time to dedicate to them. howlongtobeat.com is a great resource for figuring that out. Source: 6 months ago

(*3) How many hours does it take to beat main story where applicable. Data from https://howlongtobeat.com - may be inaccurate for games with very few entries. Source: 6 months ago