Look into Legendary (https://github.com/derrod/legendary).Frankly that "Epic Online Services" is eventually what caused me to stop launching epic games, even with the free games every week or whatever. I have zero interest installing a piece of epic software that runs 24/7.
At this point, I just wait for the game to come to STEAM or I won't play it on PC.
It allows you to run the Epic Games Store without the launcher installed at all. You can just go to the website and pick up the free games. Epic still knows you are playing the game, but they don't get to track your entire computer like they get with the launcher.