Click on the image to enlarge for a better view of Disco Wanda's pretty face.
Soul is from the World of Love doll series by Hasbro, 1971, another doll mentioned as a favorite by D7ana in another comment. This one was purchased for $6 after having been preloved and redressed. Like Career Girl Wanda, Soul is 9 inches tall.
Skye is an 11-1/2-inch fashion-action doll by Kenner, 1975, friend of white counterpart, Dusty. Skye is all vinyl, poseable, and has fully articulated spring-loaded arms and torso with jointed wrists. She wears a pink swimsuit. Additional boxed fashions were sold separately. The 1976 version is poseable but does not have the jointed wrists or spring-loaded arms and torso. That version wears a yellow swimsuit.
Finally, the original Happy Family by Mattel, 1974, includes father Hal, mother Hattie, and baby Hon. Mom and Dad are dressed in colorful outfits. Sold separately and not pictured (and not part of my collection... at least I don't recall owning them) are the Happy Family Grandparents from 1976. Grandfather is 9-1/2 inches, has gray, rooted hair, a full beard and mustache. Grandmother is 9 inches and has white, rooted hair.