Is it acceptable to create a company name for my resume as an independent consultant?

I think you shouldn't make up a company name, especially if yourself actually never presented you as such to your actual customers, for several reasons.

Background checks

First, this causes confusion. If potential employers / other customers want to do some background checking, they will try to refer you with the company name, and this could lead to "XYZ company ? no, we never worked with them, it must be a mistake". If the confusion is not cleared out, the potential employer could even see you as a liar.

Name collision

Secondly, there is also a risk of inadvertently using an already existing company name, creating even more confusion (and even, depending on countries, a legal issue).

When you create a company, you usually have to do some administrative paperwork to register officially, and this prevents any collision with existing company (to some extent, IANAL)

The first point I mentioned is not a problem if you make a company name with your actual name in it. However, the potential collision issue with another existing company name is still valid, especially if you have a common name, and if you didn't officially create a company afterwards.

Independant consultant is not weak

As an additional remark, and as you wrote in comments, I think that your premise of "independant Consultant title looks bad on a resume" is wrong, at least partly.

Your satisfied clients and successful projects will be the actual proof that you can be trusted, whether you're in a company or not. You should try to highlight this part.

Maybe there will be some concern on your ability to work in a team, but since your independant activity is management, it seems obvious to me that this not an issue in your case.

Also, working as independant consultant also implies positive skills that had to be built. Some that come to my mind : sense of responsibility, good organisation, self-discipline and able to work autonomously, negotiation skills...