If you have a preliminary understanding of electronic sound. Search "20 14 Top 100 DJ Rankings"? Global ",take their names to music software to search for their songs, and thousands of beautiful electronic sounds will be given to you.
Only rural killers are called electronic DJ, and I don't know that DJ is a profession.
Non-mainstream is an alternative meaning unacceptable to the public. It's already equivalent to killing Matt. Most of the pictures called non-mainstream on the Internet are not non-mainstream. They were all uploaded by killing Matt to carry other people's pictures.