Is there some more or less open "standard" architecture for processors with a small number of high-performance cores?

Question

Iron

Once such was x86. I can't even remember all the many manufacturers who made almost completely interchangeable x86 processors at the dawn of this architecture. But already by the time of P6 there were only a few of them left, now, as I understand it, only Intel, AMD (with their own sockets) and an outsider VIA.

Relatively many companies, as far as I understand, produce processors with ARM architecture, but they never seemed to set themselves the task of maximizing core performance, instead their main strength, as far as I understand, is efficiency as the ratio of computing power to consumed.

Is there any architecture now, the processors according to which would be produced by more than three companies and have a performance per core comparable to the Core i7?

Answer 1

From the first thing that comes to mind: SUN SPARC.
Google also suggests that the IBM PowerPC has been licensed by many companies.