on the whole vs tout ensemble

on the whole is not a noun while tout ensemble is a noun.

Word	Noun	Adjective	Verb	Adverb
on the whole	No	No	No	Yes
tout ensemble	Yes	No	No	Yes

As adverbs, on the whole and tout ensemble are synonyms defined as:

on the whole and tout ensemble: with everything considered (and neglecting details)

Other synonyms of on the whole include all in all, altogether.

on the whole (noun)	tout ensemble (noun)
	a total impression or effect of something made up of individual parts
	an assemblage of parts or details (as in a work of art) considered as forming a whole

on the whole (adverb)	tout ensemble (adverb)
with everything considered (and neglecting details)	with everything considered (and neglecting details)