Premier League - None
La Liga - None
Ligue 1 - None
Bundesliga - Dortmund (have a soft spot for their commitment to youth development and exciting style of play)
Serie A - Inter (my team)
Barca slightly edged them out for that period, but Madrid are still the biggest and most successful club in the history of football.
I say slightly because in the grand view of things domestic titles are just not as important as UCL wins. Think about AC Milan and Juventus. Globally, Milan are way more famous because they did well in Europe even though Juve are way ahead of them domestically.
When you think about how long it took Pep to win another CL after he left Barca despite being completely supported financially at his latter clubs, and also seeing how much money PSG has thrown at it without winning it…it just seems extremely tough for anyone to catch RM.
I think the time period may need to be over 100 years for it to happen realistically.