I see several people naturally mentioning the Minecraft OST, there are two resource packs I highly recommend if you want a more nostalgic experience.

• “Balanced Music” is a great pack on Modrinth that removed the biome specific criteria and re-balances everything so you do not keep hearing the same caves & cliffs song every 10 minutes.
• “C4Music” is another pack on Modrinth that removes the newer tracks (post Nether update if memory serves me right) and only has original music + some of the unreleased tracks.

To answer the question myself though, other than Minecraft of course I would have to say Terraria, OpenTTD, Ocarina of Time, RimWorld and Celeste among many other titles.