Yes, it won't be easy to implement what you ask for using Windows batch file.
I recommend that you use WinSCP .NET assembly, possibly from a PowerShell script:
https://winscp.net/eng/docs/library
https://winscp.net/eng/docs/library_powershell

Note that we do not provide script writing services here. Please try yourself, and ask specific questions.

I'm trying to figure out a way to download multiple files (with same name) from a SFTP server while appending the timestamp based on remote file attribute show in WINSCP. Right now, we currently have a batch script that runs every morning to GET a file. This becomes an issue over the weekend when multiple files exist on the SFTP server thus are overwritten come Monday during the the GET.

I've looked at https://winscp.net/eng/docs/script_download_timestamped_filename#scripting but assume such logic is impossible with a batch Windows Shell script.

Is there any way to GET a file then rename it before GETTING the next file? Please let me know if you need more information or better description. Thank you.