The thing is, that's still a bias. You're approaching it as if Americans care what foreigners want from our foreign policy.
You're approaching domestic economy from the perspective of someone making under X amount of $
It's impossible to have an objectively superior candidate for all people, otherwise we'd just review a bunch of statistics and then choose a president without voting.
We've had better candidates in the past (Mike gravel 2008, the guy who pretty much ended the Vietnam war by leaking the pentagon papers).
For me, the objectively best candidate was Rand Paul this election season, but he's no longer an option. My second favorite was Jim Webb, but again, no longer an option. The options I see are
1. Bernie
2. Hillary
3. Trump
4. Cruz
5. Kasich (oh wow, gee)
From those, for me, the objectively best candidates are in this order
1. Trump
2. Bernie
3. Cruz (This can only happen vs Hillary, but I'd prefer him over Kasich as a protest vote to the RNC, if the RNC tries to push Kasich.)
4. Kasich
5. Hillary