Jobs had to persuade him to leave HP, and do all the selling and marketing, those are also important parts of building a business. In my view it was a partnership and you're ignoring a huge part of what made Apple Apple. That leaves you with Google, which also had two very early significant players.
I'm not arguing against single founders, it's perfectly possible, but most companies are not started by a single founder, they are collaborations and are all the better for it.
Also, Larry was always the primary driver behind Google; it started out as his thesis project, PageRank is named for him, and he'd already started crawling the web by the time Sergey joined. Sergey's initial startup idea was to order pizza via fax machine. Google obviously wouldn't exist without both of them, and Larry was smart enough to share equity and credit equally, but a startup at the YC fellowship stage is much more likely to look like Larry's thesis project than Google when it took VC.