Setting the featured image on events has been really really tricky. It's a HUGE amount of real estate, and yet it zooms in way too much on whatever image we upload, including that international disability day event I mentioned above (the photo is supposed to show two women sitting side by side, as I've attached here for your reference, but I had to keep cropping it to only one woman because it zoomed in so much. Maybe there's a trick to it that I don't know? (Here's another example: the preview of this webinar event looks great, and it's centered on all the kids waving - see screenshot attached. But... when you go to the actual event page, it's so zoomed in that you can't see any of the kids, just blue sky and part of a building! https://www.miusa.org/event/youthwebinar/)
I also suspect most events don't even really need an image at all (and if there is a need, this could always be dropped into the body using the Insert Image feature). Instead, could we have the header just be a skinny bar in a solid color or subtle pattern (whatever contrasts well with the text). On the MIUSA homepage, where it says "Latest in Events," perhaps it could just show a little calendar icon (example pulled off of Google below). Not sure if it could be sophisticated enough to show the date range if it's a multi-day event; otherwise maybe just the first day of the event