It depends on what 'outright buy' means. Does it mean cash on hand or just simply using stock? Both Amazon and Google have over $80B cash on hand but the following tech companies have market caps high enough to buy Intel for under $100B:
Apple
Nvidia
Microsoft
Google
Amazon
Facebook
Tesla
Broadcom
TSMC
Oracle
Samsung
Cisco
IBM
AMD
Apple, debatable, Intel does have many nice patents but their interest on x86 has been all but entirely superseded. IBM, Broadcom and Qualcomm would also have a similar interest in Intel.
Nvidia would likely be interested, also because of patents, but also because they want to enter the CPU market. Sadly, any such deal would spell the end of Intel Arc graphics, though.
Microsoft might be interested, due to the whole Wintel deal and their profitable cloud business. Amazon, Google, Cisco and Oracle would also slot in the same vein here.
TSMC's interest in Intel would be primarily due to its foundry business, I see them interested in acquiring Intel Foundry Services, but not the other businesses. Same would apply to Samsung.
AMD is very unlikely to be able to conclude any deal, anti-trust would shoot it down as fast as possible as they would have an universal monopoly on x86. However, they might be interested in IFS to have their own fabs and maximize output for their profitable server business.
Not sure about Tesla or even any other of Elon Musk's businesses, X, XAI, Boring Company, Neuralink, etc. none of these would have any need for Intel's IP or infrastructure
So reducing to actual prospective buyers, I'd be placing Qcom, Nvidia and Apple for the IP portion, AMD, TSMC and Samsung for the foundry services and the cloud companies as prospective buyers for the company as a whole. The government may turn out to be quite protective of Intel IP and scrutiny for the transfer of technology would be quite high, however.