You can be sure that if it wasn't for The Hobbit and TLotR's TES wouldn't exist in any recognizable form.
"any recognizable form"?
I don't think so.
TES would be different without Tolkien fantasy foundation, sure, but it still could exist
Why I'm so sure? Because foundation for that still exist in folklore (fairy tales, legends, eposes, etc.)
Folklore is actual foundation for fantasy, not Hobbit or LotR