...I've always wondered --- what is a generic " American accent " to British - or other Anglosphere - people? I guess an " actor on TV " accent, but (And I see little modern US TV, so...

)........???
Kind of Southern Californian? I once heard it said about 20th Century US TV hosts Walter Cronkite (news) and Johnny Carson (light entertainment-talk);that they, both prarie Midwesterners/Nebrasans of German descent,
IIRC, we're kind of examples of " ideal " TV voices to American network s...in the America of fifty years ago, I guess, and hosts, not actors.
Ni've sometimes thought my accent is both a little too " New York " and a little too " WASP " (could it be both???) for TV producers' ideas, if I was ever in that position...maybe not.