FIORELLO?
Read the script and get the cast album. It's a very well written musical and unusual in that the leading character barely sings at all. He is defined by the songs sung about him.
I have never seen it staged, it has been rather unfairly neglected. No movie or TV version, rarely revived. But remember, it tied with SOUND OF MUSIC for the 1960 Tony award (Over GYPSY no less.)
I have also never seen OF THEE I SING (except a TV version in 1972 with Caroll O'Connor and Cloris Leachman) but of the 5 I have seen SUNDAY is my favourite. On stage I love CHORUS LINE but listen more to the score of SOUTH PACIFIC on records.
Of these 7 shows RENT is my least favourite. I like it a lot but like the other shows more.
Cast albums are NOT "soundtracks."
Live theatre does not use a "soundtrack." If it did, it wouldn't be live theatre!
I host a weekly one-hour radio program featuring cast album selections as well as songs by cabaret, jazz and theatre artists. The program, FRONT ROW CENTRE is heard Sundays 9 to 10 am and also Saturdays from 8 to 9 am (eastern times) on www.proudfm.com