Let me quickly set up a scenario: Me and my cousins all play 7 Wonders. We want to keep track of who is the last person that won and how many wins/losses we each have.
Is there a current online resource (outside of Google sheets) that can allow me to do this?
If you have an account on BoardGameGeek, then you can record "plays" of a game against that account. You can include details about other players, whether the game was stopped before the end, how long the game took, where the game was played, and who won.
You can use the iOS app BG Stats (Board Game Stats) for that use (and many others, this app is just awesome). Or you can use Nemestats, an online tool.
Rankade, our multipurpose ranking system, is free to use and it's designed to manage rankings (and stats, including matchup stats, and more) for small or large groups of players.
Its algorithm (called ree algorithm - here's a comparison) can manage - via webapp, iOS, Android - any kind of match: one-on-one, faction vs. faction (two teams, which may be asymmetrical), multiplayer, multi-faction, cooperative games, single player games, and so on.
We host many boardgames groups/clubs, as well as other sports/games ones (here's our dojo).
