So, without sports, the arguments usually go back to "what was the best team of all-time?"
I don't think we can truly answer that, even with games like OOTP. It's just so different a game from the 1920's to 2020. But one thing we can do, is look at a decade and try to determine which teams were the best of the best, so to speak.
24 teams will comprise each "Decade's League", normalized to the final year of that decade. I will try to use published sources for the teams to put in:
For example, the decade just completed (2010-19), I used this article:
Best MLB teams of decade 2010-19 | MLB.com
I tried to keep teams in the right geographic area/league, but sometimes that was not possible.
Here's the breakdown of the 2010's decade setup:
(Again, normalized to 2019)
AL East
2013 Red Sox
2018 Red Sox
2015 Blue Jays
2018 Yankees
AL Central
2017 Houston Astros *
2015 Kansas City Royals
2019 Houston Astros
2016 Cleveland Indians
AL West
2014 San Francisco Giants (NL)
2011 Texas Rangers
2014 Kansas City Royals
2019 New York Yankees
NL East
2016 Chicago Cubs
2019 Washington Nationals
2011 Philadelphia Phillies
2015 New York Mets
NL Central
2011 St Louis Cardinals
2013 St Louis Cardinals
2015 Chicago Cubs
2019 Minnesota Twins (AL)
NL West
2012 San Francisco Giants
2017 LA Dodgers
2019 LA Dodgers
2010 San Francisco Giants