Major considerations are a PC brand with good warranty/returns and reliability. Which vendor would you recommend?
That's akin to looking for the leprechaun and pot of gold at the end of the rainbow, or maybe finding a unicorn etc. There are no Major brands that fit that description and include something worth spending money on. You can Google any of the YouTube vids done by gamersnexus or Linustechtips and see for yourself.
The only 'pre-built' that does cover that is the higher end boutique companies like Maingear or Falcon Northwest etc. Not the commercial boutique builders like ibuypower or cyberpowerpc.
Majors: proprietary manufacturing and components that make upgrades or replacement products impossible except for their products. Non conformity to aftermarket standards means if it breaks, you by a whole new pc or send the entire pc back for repairs, which takes months since they already got your money in the first place.
Commercial: best bang for the buck attitude, that requires extra work put into money saving, cost cutting, corner cutting procedures like sub par coolers and single sticks of ram in the cheapest possible case with the lowest grade psu available.
Boutique: most expensive, often by a good margin compared to a similarly equipped Commercial pc, but components are better than average, top line, totally upgradable and serviceable by you, attention to details like cable management and custom built to your needs and specifications. And the best warranty/support bar none. You call them, you talk to the techs who build the pc's, not some flunky at a desk looking at a sheet of troubleshooting instructions who has no real idea what the issue is unless they happen to be in those instructions.