Formal:
* Distinguished: This emphasizes high standing and reputation.
* Illustrious: This emphasizes fame and achievement.
* Notable: This emphasizes being worthy of notice.
* Prominent: This emphasizes standing out or being easily recognized.
* Renowned: This emphasizes widespread fame and acclaim.
Informal:
* Famous: This emphasizes widespread recognition.
* Well-known: This emphasizes familiarity.
* Leading: This emphasizes being in a position of influence.
The best word to use will depend on the specific context and the nuance you want to convey.