I can't suggest any specific shoes per say, but I know there are a number of higher level brands out there which are comfortable and are somewhat more stylish that flip flops. Many have a bit of a theraputic look, so you might have to compromise a little. Also, expect to pay a little more. That's the reason I haven't tried too many)
Nordstrom is one plce to look.
I like Ecco brand. I tend to go with the 3-strap sandals, but they have wedges. Supposedly that is the brand Samantha Brown (several travel channel shows, including episodes on WDW) likes. They have more stylish shoes/sandals than the three strap ones, but I find really like that they are adjustable.
There are also quite a few really great German brands. I can't name any off the top of my head, but they exist. A small store local to me carries lots of very comfy shoes, they are all just a bit $$$. Some names are aetrx, rieker, naots, hartjes...Try "the walking Company" maybe for a list of more brands.(Maybe follow up witha Zappos.com for lower prices?)