Short answer: I can’t verify other providers from ElevenLabs’ documentation.
Within ElevenLabs, we do offer African American–accented options:
Zoe is a Default voice categorized with an African American accent (it replaces the legacy voice Aria). (help.elevenlabs.io)
You can browse the Voice Library and use the language (English) and accent filters to find more voices that match this accent. (help.elevenlabs.io)
Accent is tied to the specific voice you choose; to get a particular accent, pick a voice trained on that accent or create a cloned voice using audio with that accent. (help.elevenlabs.io)
If you want help locating African American–accented voices inside ElevenLabs, tell me your use case and I’ll point you to suitable options. (help.elevenlabs.io)
fading onyx
winter pawn