The older black actor from the brain age commercial and the Mario Kart's commercial is Garrett Morris. Probably most notable as Uncle Junior King from the Jamie Foxx Show.
Richard Brooks. He looks much older, but his voice, enunciation, and cadence is a spot-on match.
The chef in the commercial is actor and model Chris Gonzalez, NFL player Tony Gonzalez older brother ( Atlanta Falcons TE). Chris also was on a show called Mr. Romance on oxygen.
The older man with the cowboy hat in the Five Hour Energy commercial is often portrayed by actor and comedian, "The Amazing" Johnathan. He is featured in various ads promoting the energy shot, emphasizing its benefits in a humorous and memorable way. His character typically embodies a laid-back, folksy persona, appealing to a wide audience.
Cloris Leachman
John Slattery (very sexy older man)
Garrett Morris
It is Bill Cobbs.
Robert Ri'chard from cousin skeeter
Burt Reynolds
Actor Gregory White
I thought it was Burt Reynolds?
Charles Martin Smith The actor in this commercial is not Charles Martin Smith. Smith is older than this other actor.
Gregory White, 73, from Kentucky.
Billy Zane has done some Expedia commercials.
looks like an older Meatloaf
Harvey Sid Fisher
He looks like the actor Ed Nelson to me.