Do any of you personally know Mr. Haugen? Or Mr. Haas?
I think what you are saying about these men and others like them is pretty bad.
You talk about wanting to “sing your best” or “do your best” for the Lord.
Do you think these men deliberately don’t do their best? That they deliberately try to write awful (at least, in your opinion) music?
I think that’s not very nice at all. Until someone tells me that these men are non-Christians who are deliberately writing the worst music they can think of, then I will choose to believe that they are sincere Christian musicians who are asking the Holy Spirit to help them write the best songs they can write, just like I assume that when you play or cantor, that you are doing the best you can.
And as for whether their music is “appropriate” for Mass, well, as far as I know, the Vatican has not forbidden their music, and apparently, the local Catholic authorities have not banned “folk” music, or “Haugen” or “Haas,” or any of the music that you say isn’t appropriate for Mass.
If they do, then I will yield to their God-given authority, just as I trust that you will yield to their authority by NOT saying that music they have declared “appropriate” is inappropriate.
Our bishop, one of the “good ones,” a very conservative Catholic (we actually have a surplus of seminarians in our diocese), is featured on a weekly local radio show in our city, The Catholic Forum. The theme music for that show is …“GATHER US IN!”
I happen to like Haugen and Haas songs. And I’m trained in classical music, too (piano). When I first started attending the Catholic Church (as an evangelical Protestant), Haugen and Haas sounded “deep” to me compared to some of the church music I was used to hearing. So am I of sub-par intelligence because I like their music?
I think you ought to stop thinking about what you personally like, and remember that God gifts everyone differently.
As for the OP, I play piano, too, and I would use a mixture of hymns, contemporary music, folk, etc, depending on what the people respond to. If you have people who can READ MUSIC and who can actually sing on pitch in a good head voice, then try some Gregorian chant. IMO–and it’s just my opinion–Gregorian chant sung by ear singers who use a throat voice and can’t hit pitches is like listening to caterwauling cats.