On youtube search Kevin Macleod. All royalty free. The channel hosting his music called Eric Archive has been safe to click on their links to download the songs has been safe for me and my computer for years of video making. I also upload video with Kevin Macleod music on FB no problems ever with copyrights. He has a TON of music and all different styles of music.
Second choice, is mostly all electronic and industrial music but some rock music is TeknoAXE. Search him. All free and never one issue using his music.