Leading scientists and futurists in the field of longevity at the level of David Sinclair, Aubrey De Grey (probably one of the first founders of the topic of longevity), Liz Parish (gene editor, tried his invention for the first time and really got younger), David Church, Jose Cordeiro, and so on

Aubrey De Grey (UK)
David Sinclair (US)
Jose Cordeiro (Spain)
Oliver Zolman (UK)
Vadim Gladyshev (US)
Alexey Moscalev (Russia)
Liz Parrish (US)
Eric Verdin (Belgium)
Brian Kennedy (USA)
Andrea Maier (Germany)
Bryan Johnson (USA)
Nir Barzilai (Israel)