The funny thing about the whole PC side show, is that the TRS-80 and the PET 2001 were launched along with the Apple I/II as part of what was later labeled the '1977 Trinity'. Never mind that in those early years the Trash-80 greatly outsold the Apple. And the PC was an evolution of incremental computer technological innovations, miniaturizations, and cost reductions over several decades, not an "invention" by someone.
It kind of depends on how you define 'PC'. The traditional definition would be a computer meant to be bought and used by individuals. In that case, the 1964 Programma 101 was without doubt the first commercial PC. Of course, that wouldn't have been the first Personal Computer perse; that would likely be a title to go to the 1950 SIMON. But the SIMON was primitive even for the day and really only available to people who could build them themselves. There's a bunch of other personal computers that predate the systems you mentioned, of course. The first one that really resembled modern computers was the CTC Datapoint 2200, released in 1970.
Interestingly, the Datapoint 2200 was originally intended to have an 8bit microprocessor for its cpu built by Intel, but CTC ran out of money and was forced to use a more conventional design instead. This left Intel with the chip design; the 8008. This chip, of course, became the father of their next generation chipsets... which we now know as the birth of the x86 architecture which is found in all modern personal computers (including those built by Apple nowadays).