PLATITUDINARIAN

Platitudinarian (plat-i-tood-n-AR-ee-uhn, -tyood-) noun

-One who utters platitudes or trite remarks.

-One who frequently utters dull, flat or banal remarks

For E.g- Her successor, Livingston Biddle, was a platitudinarian, who to this day
likes to expatiate on his slogan that ‘the arts mean excellence’; one
need only listen to him for two minutes to cease believing in art and
excellence both