Hi there,
I can see that something similar to your suggestion has already been done by another designer(currently ranked first)
If his/her design was done upon your request(you asked him to do ''something like a pepsi logo with a road going through the circle, starting wide from the bottom of the circle and stretching across the circle, getting smaller into the distance with blue sky on top and green grass or wheat coloured field on the bottom.'')
it would mean that its your idea and it will not be a problem for me to fulfill your request..
However if the design was his/her idea I will not do it because the designer owns this concept...
I cannot read the communication between you and the other designers , please let me know what is the case so I can tell you whether I can or cannot fulfill your request..
Best regards
Stickie