Who are four Mexican American singers from the Rio Grande Valley who have had record hit songs?

The four Mexican-American singers from the Rio Grande Valley who have had hit records in the English market are:

Freddy Fender from San Benito, Texas.

Next is Noe Pro from McAllen, Texas who had record hits in the 1960's; there was Balde Silva from Weslaco, Texas with "Toby Beau" fame in the 1980's.

Then there is Andy Veliz from Weslaco, Texas who had his hit song, "Lonely Nights Without You" in 1980.