Well there was a paid software you linked me long ago, which allowed control over all RGB of all brands and it worked very well until the trial ran out for me. It was overpriced though for what it was. However if its only RGB you wanted as an all in one solution, then 1 software is the way to go.
My issue is the need for peripheral software which is obviously unavoidable if having some MMO Corsair mouse and a Razer KB for example. But still... one software to rule them all makes my taskbar running process list happy