And the last post, before mine (which I hadn’t read yet), is just great: nothing more needed! Perfect as is
And regarding the actual topic: no one can really give you a final tip, because some have had good experiences with one construction company, others bad. For companies operating nationwide, it also depends a lot on the regional staff. So if, for example, you have a good site manager, you will usually rate the company much better than someone who builds with the same company elsewhere but has to endure a lousy site manager.
Therefore: look around which companies would even be an option for you, make a long list, go through it again, make a short list and contact those.
It has also been noted here before: don’t necessarily fixate on a nationwide company. There are surely providers in the area who build regionally and can offer you an individual solution (very often the better one!) and are not or not much more expensive. Personally, I prefer it individual (and our budget is pretty much within what is generally discussed here, so not more expensive).