You've failed to tell us what you mean by 'professional quality' and ignored requests to show us what you mean.
I'm really not sure how much help anyone can be, when you're not explaining your question well at all....
...you have not defined what you mean by image quality and therein lies the issue, what you think of as quality is not what others may think of as quality - define and hopefully you will get some interesting debate
I think he has defined it - pin sharp, no noise. so many images we see are soft, deliberately so, they may well be pin sharp where the photographer intended but the rest of the image is soft with plenty of bokeh, although the images can look strong I'm guessing this isn't what the OP is after, instead an image where everything is clear, little to no noise, well lit, large and clear.
It's not about what you, I or anyone else define as perfect, it's simply the words the OP has chosen to use to ask the question. 'Perfect' may be wrong, in fact I'm sure it's wrong. It's obvious the best images ever taken were far from technically perfect, many were down to right place right time, in some cases they were most likely with a hell of a lot of luck, there was no time to tweak settings, change lens and judge the lighting. The photographers skill produced the best possible image and they become timeless. I don't think that's in any doubt, the OP isn't after an award winning image to get people talking for decades, it's about taking a technically sharp image with the right colour balance, saturation, contrast, and more.
I never mentioned the creative aspects because I don't want to know about them. I'm not asking how to take good photos, improve my creativity, or capture anyone's soul. I'm talking about image quality and nothing else....
See above - am I close? I'm guessing you've had most of the answers, probably all of them, and it's a combination of many things. He main one is probably the camera, you will probably need a full frame or maybe even a medium format camera with the best lenses to get what you want. The image will need to be well thought out rather than captured by luck, the light shouldn't matter, it depends on the image of course. Obviously you have more control using a tripod in a studio with strobes, but an outdoor scene on a dark stormy day could be just as good if the equipment was in the right hands.
In my opinion if you gave me the above mystical camera setup the images wouldn't Ben much better than I'm capturing already, in fact for quite some time they'd be worse as I would need to work out how to take the lens cap off! What I also know is upgrading a lens from a kit lens or something basic can making the image quality better, but there's so much more to it than that. Although I do know what you mean (well I think I do) I think it's about skill levels, the subject matter, the camera body, the lens, the camera settings, the exposure settings, the lighting, and probably other stuff I've got no clue about.
If you want support to buy a new lens go for it, but will it give you the holy grail shot you dream of - I personally doubt it. That's no reflection on your skill. It's about the range of other things, I guess if any of us needs to ask how to get the perfect shot we are not capable of making that picture just yet.