I don't think going back 15 years provides great examples for the game today.
With that said, Prince Fielder is only 5'11 and he does ok. I think he's the only one 6' or shorter though.
2nd base is clearly where he'd have the biggest impact now for us, but down the road, I wouldn't rule out Werth(Zim has already been mentioned) as a possible 1b candidate. As he gets older, his range is going to diminish. With Goodwin close, we may be looking for an OF spot for him. Rendon may even play OF. Or if Hood emerges. Not saying expect it, but its a possibility.