The Yakuza/Like A Dragon (LAD) series has a criminally underrated soundtrack. The games are finally mainstream enough to get an English dub, but I feel like they're still pretty niche compared to other games. The soap-opera tier dramatic plot juxtaposed with the zany side content and over-the-top gameplay* is an experience you don't quite get from any other franchise.
*Yakuza Dead Souls is a 3rd Person shooter. Yakuza LAD and LAD Infinite Wealth are turn-based RPGs. Other than those exceptions they're third person brawlers.
The games have several composers but Chihiro Aoki is the best one overall, IMO. No disrespect intended toward the other fantastic composers, of course. Most of them are instrumental tracks since they're usually BGM for fighting or boss themes, some also have background vocals but they aren't the main focus.
Shoutout to SnowiestAngeman for making composer-specific playlists like these:
Chihiro Aoki: https://www.youtube.com/watch?v=2DIpJ77nRYA&list=PLN58ITKbq8wAnoPktqKwVZVUImQMrrlxM
Hyd Lunch: https://www.youtube.com/watch?v=OzMHwWkEU9g&list=PLN58ITKbq8wDRV8DKGzxGnZHW_EQhD6F7
Hidenori Shoji: https://www.youtube.com/watch?v=6nRGasGuAhM&list=PLN58ITKbq8wDbjMFYDeQEWCtzcnrOTjOt
Yuri Fukuda: https://www.youtube.com/watch?v=tngjDA9Yeek&list=PLN58ITKbq8wDq3nwGqoaaVJixTYbpLqku
Most, if not all of the game OSTs are also on Spotify, if that's more convenient: https://open.spotify.com/playlist/7HKUkWNhAraux7lGWYWgXZ
Not sure if these games are on Ross' radar or not, but if I had to choose a "top 5" of the franchise it would be (in no particular order):
Yakuza 0
Yakuza Kiwami 2
Like a Dragon: Ishin
Like a Dragon: Gaiden The Man Who Erased His Name
Lost Judgment