General Excellence:
* Exceptional
* Remarkable
* Excellent
* Superb
* Brilliant
* Impressive
* Noteworthy
* Extraordinary
* Magnificent
* Splendid
Financial:
* Unpaid
* Due
* Overdue
* Unresolved
Other:
* Prominent (for something that stands out visually)
* Conspicuous (for something that is easily noticed)
* Eminent (for someone of great distinction)
* Distinguished (for someone who is highly respected)
* Renowned (for someone who is famous)
The best synonym will depend on the specific situation and the intended meaning.