Phillip Glass Fans

if you like Glass
also try Steve Reich

music for 18 musicians
and others

Reich uses more mallet instruments and sparser instrumentation
Music for 18 musicians is a great starting place
Peter Gabriel's San Jacinto has Reichian flourishes

I saw Glass in Detroit around 83
his consort was playing at Rock volumes
at one point I was dead tired and bored
then it was like the sky opened up and passages varying slightly overlapped in a way that was totally mesmerizing
performers used to bitch about his repetitive parts until they were in the midst of the full score

an odd tidbit, Glass was working as a cab driver in the early 70s to make ends meet before Einstein

Glassworks is the most accessible Glass piece
Einstein is fun
Koyanisquatsi is a must have film and you get the soundtrack gratis

I've heard Adams but not enough to comment,
enjoyed it

if you enjoy these try Brian Eno's Music for Airports