At WDW we have stayed in grand villas at:
SSR (many times)
VGF
BLT
AKV-Kidani
The VGF grand villa is ... grand. It is very spacious, bright, gorgeous finishes and details. Truly stunning. It has an extra media room, and we enjoyed that extra space. It is all on one level. Highly recommend.
Kidani savanna view is fun, but the villa is very dark. It is 2 floors.
We stayed in a BLT theme park view in February - this was so fun! We love the location of BLT - the proximity to MK. This grand villa is also 2 floors. The laundry room in the villa is spacious, which is nice.
SSR is our home resort. We love it there! The grand villas are nice, comfortable and feel “homey” to us (we have not stayed in a newly refurbished villa yet though)
If you have any questions about any of these let me know!