Harmonix owns Rock Band. And Epic Games owns Harmonix. Fortnite Festival is (unfortunately) the spiritual successor you mentioned, except you gotta buy every song because of course. (Free players have 5 tracks they get to do for free but if you want a decent library you gotta start buying em from the shop)
Microsoft owns Guitar Hero
Harmonix owns Rock Band. And Epic Games owns Harmonix. Fortnite Festival is (unfortunately) the spiritual successor you mentioned, except you gotta buy every song because of course. (Free players have 5 tracks they get to do for free but if you want a decent library you gotta start buying em from the shop)
Clone Hero is the alternative