Waaaaay before Dr. Phil and other "advice" shows, there was Dr. Joyce Brothers. She was the pioneer of that genre and occupied it alone for decades. She was a regular staple on Johnny Carson and other talk shows throughout the sixties, seventies and eighties.
Interestingly, her TV debut was on a game show before she had her own show. She appeared on The $64,000 Question and was given the topic of boxing. And she won! (Several years later, it was discovered that many contestents on the game show were given the answers in advance, creating the famous quiz show scandals. To this day, nobody is sure if she was one of the cheating contestents — she said no.)