The Waymark editor lets you upload you own logo on many different templates, and will include everything in your original JPG or PNG file.
If your logo has a background image or color that you need to remove there's a couple of handy guides that can help you remove backgrounds from images.
Here are two handy guides that will help you remove image background on Windows or Mac.
Guide for Windows
Guide for macOS
If you're still having trouble with your image, make sure your image is saved as a PNG file with Transparency and is high enough resolution for programs to accurately remove the background