Prominent or prominent describes something that stands out or that is easily noticed, or someone who is well-known, professionally --
After a few miles you will see a prominent ridge; turn right at the next intersection.
He has been a prominent member of the town council for many years.
Preeminent or preeminent ( also spelled pre-eminent ) describes a person who is the most famous, best qualified or most distinguished in some field or occupation --
He is the country's preeminent economist; let's ask him what he thinks.
She had the assistance of the preeminent researcher in her field.
Now that you know that, you can say--
"We'll need to choose the preeminent applicant from a group with several prominent candidates."
