I think Rick Schroder is one of the few modern child tv stars that were able to whether it through to adulthood without law enforcement problems.
Not sure how popular this show was since I didn't watch TV in the 80s or early 90s - but this gal did okay other than dressing badly. Saw her on What Not to Wear - she has a nice hubby, couple of cute kids and a Phd in neuroscience.
There’s only a handful that come to mind. Rick’s one and Alyssa Milano is one that consistently remained in the limelight and did well for herself. Hardpressed to think of many more.