I think it's a pretty good idea to compile a list of good value tournaments, but at the same time I think it's very difficult to do so because there's such a vast amount of tournaments out there.
Personally I'd say there's more and more value in tournaments as the field gets smaller and/or weaker. So if we're looking at Stars tournaments, I believe there is a ton of value in the tournaments that do not have a guarantee. The reason being they attract far less players than all the tournaments with guarantees, especially tournaments like the Bigs or Sunday Majors.
At the same time, these tournaments with guarantees attract a ton of fish, so they're great value as well. At the same time, this means a large field size, and thus much higher variance. That's another advantage of the tournaments mentioned above; less variance.
Also very, very, very +EV are the Zoom tournaments. I guess they're high variance, but there's so many fish it's not even funny.
Also want to address this:
Yes, if that leaves lots of GTD money as an overlay.
What I think is really important is to not look at the nominal prize money you can win in a tournament. Just because you can win $20k with a specific tournament doesn't necessarily mean it's going to be a better value tournament than one that has only $500 for a first place finish. Even if there's no overlay with a small field size, a small field size is almost always a good thing, because it reduces variance a ton.
That said, I do think that despite the huge field size, tournaments with large guarantees are great value because of the huge amount of fish that play these tournaments, even if they're higher buy in tournaments.
Lastly, personally I think regular speed tournaments or deep stacked tournaments are better value than turbo tournaments. Turbo tournaments do give a better hourly, but I think the slower structures give you a huge advantage over all the fish. In turbos it becomes a pre flop game pretty quickly, whereas in deeper stacked tournaments you give the fish opportunities to screw up post flop as well, giving you a much bigger edge.
But these are all just my opinions, feel free to disagree 
Due to some technical problems I'm not really playing much atm, but I'll try to find a few tournaments that I've played that I think are great value and list them here later