I have a wide toebox but narrow heels, high arches & high volume (especially when my feet swell) so even Clark's shoes can become too uncomfortable or tight from one year to the next. Maybe talcum powder could help?
I've had better luck with sandals that are adjustable both around the ankle & the front strap - I can vouch for the Hush Puppies Bodyform line (I've bought two!) I also wear khaki EVA Birkenstocks as casual slides in the current situation - not as great for long distances, but the arch support & adjustable front is there.
Another vote for FitFlop flats here, too - have both casual & dressy options that I can wear with or without swelling, thanks to the laces or wearing with/ without thicker socks.