Here are some fine yodelers. Don't see a pattern in home states
and none is from Texas (although Don Edwards lives there now,
he was born in New Jersey!).

Wilf Carter aka "Montana Slim" - Graysboro, Nova Scotia (CAN)

Douglas B. Green aka "Ranger Doug" - Great Lakes, Illinois

Jimmie Rodgers aka "The Singing Brakeman" - Meridian, MS

Don Edwards - Boonton, New Jersey