I don't know much about good traditional publishing companies, but I've heard that often it can end up being more rewarding to self-publish, and hire your own help such as freelance editors, cover artists, etc. because you have more artistic freedom, and you could get better pay since the money goes to you.
Taking Webtoon (a comic posting site) as a good example, you can either post your comic there on your own time at your own pace, or you can let Webtoon publish for you and you get some monetary reward, but it is often negligible for the work done. But if Webtoon publishes for you, they will change parts of the story, shoehorn you into writing/drawing what you may not desire to, and hold you to a weekly posting schedule (very hard to maintain for an artist hoping to draw anything of a decent quality).
That being said, you may have practically full control, but you also have full control. You're in charge of figuring out how you get paid, whether that be patreon (donation), classes, merchandise, etc. And regardless, you do have to learn how to use social media to advertise your work, and even then, it will take some time to get off the ground.
Bottom line, self publishing, from my research, is a rewarding option if you have the time/money to get started. Traditional publishing is good, too, but I don't know of any good Traditional publishing companies, as I early on decided to self-publish to retain as many rights as possible since traditional publishing seemed like such a gamble.
I know this doesn't really answer your question, but I hope it might help! I've heard enough horror stories about writers and artists being dragged down by big companies, that I tend to be a bit gun-shy about letting a large corporate business have control of my work because of what Disney has done to so many good franchises, and what I've heard of Webtoon's problems.