Starting with the understanding that 'mastering' covers more than what's being discussed here...
"Experience doesn't always sound good," but no one brings up what guarantees we hope to expect from LACK of it. And how about the 'education' part? Know-how does play into it. Also interesting that 'Antigravity' and 'Fittest' were brought up, both of which were done by someone who currently offers professional mastering services.
No one would argue that the pros can get it 'wrong' sometimes in the opinion of many listeners, but the implication that 'pro' is as much a crap-shoot as 'DIY' is a honking great conceit. You're much, MUCH more likely to get amazing results from someone who makes it his or her profession. But do your homework and find a good pro, if you care enough, like Rozo does, about getting your product to sound as polished as possible to as many people as possible. If the choice was between someone like Bernie Grundman, who's done everything from Steely Dan to Dr. Dre, and whose name is guaranteed to be found in everyone's album collection, or someone with Audacity and a soft-knee compressor/limiter VST... well, you'd be shit outta luck, because you probably can't afford Bernie Grundman. However, I'm comfortable recommending zircon, who likely is affordable, and is proven.
All that said, I don't think it's necessary to list examples of well-mastered albums, because I'm certain your all-time favorite albums will fill the bill quite nicely. And it helps to study each whole album, backwards and forwards, to understand as much as you can how peaks and dynamic ranges between tracks are controlled, among other things. Goes without saying we should keep learning, whether or not we let someone else do it for us.