I agree with the Alberto idea, except not as a lead off hitter. His lack of walks is concerning, slightly mitigated by his contact rate.
Disagree about Stewart. There seems to be this narrative that he can't play defense and I've never really understood it. Scouting reports see him as slightly below average. Now, Mountcastle, there's a guy shouldn't be anywhere near the OF on defense. I like Stewart's work ethic. He puts in the work and he's willing to improve defensively. That's half the battle.