@naulaksan
What resolution and text scaling are you able to get?... I have been able to install Mojava on my Dell Optiplex 9020. It boots in to the MacOS fine, but only allow me to have 25** x 1600 (don't remember exactly) resolution. I tried what you mentioned i.e. coping all kexts from EFI to L,E and then executed the terminal commands as you mentioned but then I am unable to boot in to the OS and have to reinstall it fresh.
Would you mind sharing your EFI folder and config file
thanks