Sentence examples for a marvelous role model from inspiring English sources

The phrase "a marvelous role model" is correct and usable in written English.
You can use it to describe someone who serves as an excellent example for others to follow, often in a positive context.
Example: "She has always been a marvelous role model for young athletes, inspiring them to strive for excellence."
Alternatives: "an exemplary role model" or "a fantastic role model".