Are we talking about signers of the Declaration of Independence or more broadly.. not sure what Salem has with Declaration or if he's counted as a Founding Father. I'll give you Hamilton though since he was involved and neither did George Washington nor James Madison sign the Declaration but are still counted as Founding Fathers - https://www.archives.gov/founding-docs/signers-factsheet

I was going off of this: "An asterisk signifies that the individual was a signer of the Declaration of Independence" in my source.

That being said, I take the National Archives as a more authoritative source than a Slate article!