All the options that you have tried seem to be for Windows 8 in mbr mode,but you are using UEFI, so you should repair UEFI partition; when my windows bootloader got corrupted,i tried the following command.
All the options that you have tried seem to be for Windows 8 in mbr mode,but you are using UEFI, so you should repair UEFI partition; when my windows bootloader got corrupted,i tried the following command.