Tony is searching for a command-line tool that will enable him to download files through HTTP and HTTPS, SFTP, and TFTP, all from within a single script. Which tool from the following list would be the best choice for him?

For this particular use case, the curl command-line tool is the most suitable option since it supports downloads and uploads from a diverse range of services. On the other hand, hping is utilized for packet crafting, nmap is a port scanning tool, and theHarvester is an open-source intelligence gathering tool, none of which meet Tony's requirements.