unflashy
The new work is a controlled and unshowy piece.
His tough, unshowy performance makes the film very watchable.
The young player performed with an unshowy neatness and efficiency that impressed his teammates and the crowd.
The unshowy assurance of his performance was delightful.
The conductor's unshowy professionalism proved invaluable.
Her career has followed a solid, unshowy path.
The houses are distinctive but unshowy.

SMART Vocabulary: related words and phrases

Exaggerating & playing down
bloviate
blow something out of proportionidiom
cartoonish
cartoonishly
catastrophize
fulsome
go overboardidiom
inflated
make a mountain out of a molehillidiom
make little of somethingidiom
make much of somethingidiom
make something of something/someone
meal
mildly
minimization
OTT
protest too muchidiom
romanticize
underplay
underrate