However, if you're looking for synonyms that are a bit more ambitious in their own right, here are some options:
Formal:
* Aspiring: Having a strong desire to achieve something.
* High-achieving: Demonstrating a strong drive to succeed and consistently reaching high goals.
* Visionary: Having a clear and ambitious idea of the future, and working to bring it about.
* Progressive: Always seeking improvement and development.
* Trailblazing: Pioneering new paths and making groundbreaking advancements.
Informal:
* Go-getter: A driven and determined person.
* Driven: Having a strong internal motivation to succeed.
* Motivated: Having a strong desire to achieve something.
* Hungry: Eager to learn, grow, and achieve more.
* Passionate: Having a strong and enthusiastic interest in something.
Other descriptive phrases:
* Reaching for the stars: Having very high aspirations.
* Setting their sights high: Aiming for challenging goals.
* Driven by a relentless pursuit of excellence: Always striving for the best possible outcome.
The best word or phrase to use will depend on the specific context and the tone you want to convey.