Best Power-up For Aggregating Due Dates

[Megan Kelly]

I have a hundred+ boards (1 per client) and on each board we plan on doing a calendar/timeline where we enter all the tasks and plan out how long it will take each thru to launch.  Because we have so many clients as a PM I need to holistically see ALL projects/work we have going on in a master calendar.  Is there a Power-Up that would aggregate all the board calendars to a master?  I see the Power-Ups "Planyway, BigPicture, TeamGantt) but I'm not sure which will get me what I need.  Really appreciate everyone's help.

[Nate Fenimore]

I actually just mentioned this in another post... I really like Gantiffy (https://gantt-chart.com)

I allows us to look at projects more holistically