most superior in quality (of a group)

most excellent

the one, single, example; and no other; and nothing else or more; but it must me added that; (used to introduce a condition or reason)

singular

with everything needed; without fault; exact; accurate; complete

flawless, superlative

first in order of importance

most important

highest in rank or authority; most important; greatest

greatest, principal

having no equal

superlative