You will find that consonance is back with a vengeance when you listen to most of the music of Avro Part, and a good deal of John Adam's music is resolutely tonal. Ditto Michael Torke.
Steve Reich is (to my ears) a much more interesting and musical composer than Phillip Glass; Reich is also a milestone / mainstay of the 'minimalist' school.
David Lang is another American composer who remains primarily very tonal.
Tonality never went away, really, as much as it quite naturally expanded. It is generally agreed that Schoenberg's twelve - tone system was a direct result of the increased chromaticism of later Romantic music. The system was given the horrible misnomer of 'Atonal.' Those naming it meant it merely did not adhere to the common practice 'rule' of Dominant / Tonic, which had been undergoing heavy revising from the beginning of the romantic era, i.e since middle to late Beethoven!
You should listen to Stravinsky's 'Apollo,' for string orchestra ~ just to hear this lush 'Neo-classical' and very tonal music, and to know he wrote differently than Le Sacre du Printemps.
All dissonance is relative. Mozart and Beethoven were considered dissonant in their day.
best regards, petr b.