if it helps to narrow it down, here's the houses that haven't been approved yet that you can melon:
both the ss houses
the /warp ball harbor master
the whdocks brothel
both of the wullvillage3 homes
The manderside homes. (you've already meloned these but I went back and made some improvements that you can look at)
all my other ones are approved so you won't get much out of meloning those. I hope this helped