Some of the artists mentioned
in this thread have videos around/over your specified length.
That kind of run time is not exactly common for western animators (as far as i know), much less for "good quality" content. The exception would be people who work with various game engines based animations (Skyrim, Wild Life, Sims 4, The Klub 17, Koikatsu, Honey Select, Etc.). On those, it's actually quite normal for the videos to hit or surpass the 15 minutes mark.
Then again, "good" quality is not only subjective, but also not particularly specific. Maybe clarify what you meant by that? Like, are any and all animations made with, say, Source Film Maker, of "bad" or "average" quality to you? A little more clarification on that would be nice.
As for the tags,
Wantan Works in particular have them in every single one of his works (essentially, all of them involve dudes gangbanging the shit out of girls).
And finally, i'll leave some videos here for you to check, just in case:
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