In my opinion I don't think Jimi really did it to the extent Kurt did, and plus Nirvana not being all that similar to Jimi.
It was pretty much like Kurt was so popular at the time he could put out any song and everyone would love it, stuff like:
(I do like those songs though
)
Also Cobain so big at the time he would she people what else is out there, bringing The Meat Puppets to MTV Unplugged, performing with the vaselines amongst many other artists.