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I suggest the same approach to poll aggregators as aggregators use to polls.
Which is to say, basically, average them.
538 has the highest Trump number. So they are like the LATimes tracking poll, they have a big Trump house effect. NYT has Hillary much higher and PEC has her higher still. If you look at the average of these and others, Hillary is in pretty good shape.
I don't think there's any corruption among any of these people, they are all trying to do their best. Nate Silver isn't secretly trying to inflate Trump's numbers, it's just that his model turned out to give Trump better odds than anyone else. That's fine, but other equally qualified people crunch the numbers differently.
So average them.