I want to tear out some old concrete and do a minimalist patio with 2 foot by 2 foot concrete pavers with 3 inches space between them, filled in with a ground cover. What is the short list of groundcovers I could grow between the pavers that would support the weight of an adult woman wearing high heels? I don't want a soft ground cover that would let a heel just slip down into the soil between the pavers. I was thinking of using a friable succulent soil or bark soil to support the groundcover, but having a requirement to support heels might instead argue for using clay loam and finding a ground cover that can grow in that.