non participating (adjective) neutral: impartial, noncommittal
Sinonime: A-1,
ace, blue-chip,
choice,
excellent,
fine, first-class, first-string, five-star, highest quality, in a class all by itself,
prime*,
sound,
superior,
supreme, tiptop, top-level, uppermost, very best, very good
Antonime: biased, committal,
partial,
predisposed,
prejudiced