Hi, I personally prefer good lyrics for my projects. It seems to me that such music is great for background accompaniment, although sometimes some people also perceive good sound well. All individually. I can recommend free music here https://www.melodyloops.com/music/.
In my opinion, these two concepts are not separable
Because an interesting combination and unique sound make music the best among many pieces. That's why I always use background music search on TakeTones https://taketones.com/search and here I find cool tracks