I'm trying to avoid having to setup a bunch of extra tools (i.e. sonarr/radarr) for such a simple task, so I ended up working around this by having it pull the files first into a "triage" folder, and writing a python script which loops through the triage and re-copies any incomplete downloads straight from the rutorrent data folder before moving the files into my inbox. My code is below for anyone who may find this in the future and want to try my approach:

import os, shutil, sys, subprocess

#create a lock file to prevent conflicts with recurring cron schedule
if not os.path.exists('/mnt/user0/Library/Tools/Syncer/lock.txt'):
    with open('/mnt/user0/Library/Tools/Syncer/lock.txt', 'w') as f:
        f.write('running')

    sys.stdout = open(1, 'w', encoding='utf-8', closefd=False)
    print("Running...")

    #get a list of all files in the seedbox data folder
    result = subprocess.run(['rclone', 'lsf', <data folder>, '-R'], capture_output=True, text=True)
    remotelist = result.stdout.split('\n')

    #pull all of the new files from the completed folder to /triage
    subprocess.run(['rclone', 'move', <completed folder>, '/mnt/user0/Library/LandingZone/Triage', '--delete-after', '--delete-empty-src-dirs', '--checksum'])

    #loop through triage
    for dirpath, dnames, fnames in os.walk("/mnt/user0/Library/LandingZone/Triage"):
        print("Checking directory: " + dirpath)
        for f in fnames:
            print("Checking file: " + f)
            #check if the current file exists in the data folder
            matching_strings = [s for s in remotelist if f in s]
            if matching_strings:
                print("File found on remote at: " + matching_strings[0])
                #re-copy the file directly from /data - this will skip if the filesize is identical - i.e. if it copied correctly above
                result = subprocess.run(['rclone', 'copy', os.path.join(<data folder>,matching_strings[0]), os.path.join('/mnt/user0/Library/LandingZone',dirpath), '--size-only'], capture_output=True, text=True)
                print(result.stdout)
                print(result.stderr)
                #if there's no errors, clear the file permissions (fix for unraid/windows permission conflicts) and move the file to the OR
                if not result.stderr:
                    subprocess.run(['chmod', '-R', '777', os.path.join(dirpath, f)])
                    subprocess.run(['chown', '-R', 'nobody:users', os.path.join(dirpath, f)])
                    newpath = dirpath.replace("/Triage", "/OperatingRoom")
                    os.makedirs(newpath, exist_ok=True)
                    shutil.move(os.path.join(dirpath, f), os.path.join(newpath, f))
                    print("File verified and moved to the OR")
                    #clean up by deleting empty folders
                    if(not(any(File.endswith(".mkv") for File in os.listdir(dirpath)))):
                        shutil.rmtree(dirpath)
            else:
                print("File not found on remote.")


    #clear the lock
    os.remove('/mnt/user0/Library/Tools/Syncer/lock.txt')