General Antonyms:
* Ambitious
* Aspiring
* Driven
* Goal-oriented
* Motivated
* Purposeful
More specific antonyms:
* Enterprising (implies a willingness to take risks and innovate)
* Visionary (implies having a clear vision for the future)
* High-achieving (implies a strong desire to succeed)
* Go-getter (implies a proactive and enthusiastic approach)
The best antonym will depend on the specific situation and the meaning you want to convey.