After being out of the hobby for awhile I have been pleasantly surprised to see the hobby explode with a lot of wonderful kits.
I mostly build World War 2. I like 1/32nd in general BUT since my son a few years ago got me to get into it again I have learned to appreciate 1/72 and 1/48 as well.
The companies are producing really nice kits on subjects I would dream about,i.e. 1/32 JU-88, 1/32 HE-111, etc.
The quality has vastly improved with better fitting parts, more detailed easy to follow instructions, acryllic paints that are easy to work with and spot on accurate.
Enamel paints were such a pain to use with all the chemicals and smell and bio-medical hazards.
Anyway I don't believe there is any one top company although I will say TAMIYA is producing some museam grade 1/32 scale kits. Once again, Revell Germany, Italeri, now AIRFIX, just about all of them are starting to crank out very well impressive kits.
You have to do your research, get on this forum and find out from others what their opinions are and make a judgement for yourself.
We appear to be ina new Golden Age as there are SO many kits to choose from in all scales and all levels of procing.
THat's a good thing to me