You can design an image collage or use one big, beautiful photograph — just keep the cover photo shape in mind when setting up your composition. Your company logo should appear somewhere, usually in your profile icon, in which case it is not needed as an extra graphic in your cover ...
That said, a bit of tinkering never hurt anyone. It is highly advisable, if you have Photoshop and some rudimentary skills, to get the .psd (photoshop file) off your cover artist as part of the deal, with text on separate layers. You will then be able to tinker to your heart’s con...