I'm a little concerned by your title for this thread: "any real Christian who despise ungodly music like rock, country, rap, CCM?" You are implying that we are not real Christians if we do listen to any of those things. From the onset you are confrontational. Your OP says that you are looking for people to talk to. It doesn't seem to be going very well.
But onward to your main point:
I'm curious - what is acceptable music to you? Hymns? Many of those melodies began as tavern songs. Then somebody made up Christian lyrics to the well-known tune. Are these unacceptable because the melodies have secular origins? Do you only listen to the hymns that did not start this way? Have you researched which ones are okay and which ones are not?
But really any music that you hear in Western civilization, whether sacred or secular, is going to have pagan origins. The early church didn't have tertian harmony to begin with - that was introduced as they encountered other cultures. Many of their musical styles were adopted and eventually formalized by the Florentine Camerata in the 1500's, because that's what big government does. But musicians, being the creative souls that they are, began breaking the rules, adding more complex harmonies, including the tritone, which was considered to be the "Devil's Interval." Most hymns today have a dominant seventh chord, which includes this interval.
So, I ask in all seriousness - - do you only listen to plainchant? If not, you would see that you would be breaking your own rules once you did a little research into music history.