For this franchise, it has to be the Braves. Sure, I'd love 2 titles over a 20 year span, but this city went 30+ years without baseball and with that came 2 generations of fans lost.
Nobody yet has grown up living and dying with the Nationals. We're getting there, but it takes a long time. The Braves run would give us 20-25 years of that and we would have a much stronger fanbase because of it. That's what I want. I want some crap like San Francisco has where some random ass Tuesday game against a random team is sold out as the norm. Except we won't be wearing winter coats in the middle of summer.
Look at the Wizards. Nobody has lived and died with that team for 30 years. We have only died. That's the result of 30 years of being AT BEST the second worst franchise in the sport. Yeah we'd have two random titles but sustained success is what really matters when you're trying to grow a new fanbase. Plus we have a huge geographical area to the south of us that we could start to conquer with a run like that.