The Oxford Dictionary of National Biography (https://en.wikipedia.org/wiki/Dictionary_of_National_Biography#Oxford_Dictionary_of_National_Biography https://en.w

The Oxford Dictionary of National Biography (https://en.wikipedia.org/wiki/Dictionary_of_National_Biography#Oxford_Dictionary_of_National_Biography https://en.wikipedia.org/wiki/Dictionary_of_National_Biograp...) follows a similar model to the SEP to deliver on the comprehensive/authoritative/up-to-date trifecta. Unfortunately it’s paywalled, unlike SEP, but it’s certainly the best biographical encyclopedia I know of because of this.