The phrase 'and whomever else' is correct and can be used in written English.
You can use it when you are referring to an unspecified group or individual, typically to give an inclusive impression. For example: "We invite all our friends and whomever else would like to join us for the party."
The shower, though, had plenty of room for me and whomever else I might want to invite inside.
Manning is the marquee attraction; Victor Cruz and Hakeem Nicks and Martellus Bennett and whomever else Manning happens to throw to are the featured players.
Then Mr. Sultan returned to Manhattan and moved into Studio We, the performance space on Eldridge Street, recording and resuming his playing with Mr. Abuwi and whomever else.
Abortion is the lone procedure for which it is not legally sufficient for a patient to consult with medical professionals and whomever else she wants to involve -- her partner, her siblings, her friends, her parents, her clergy.
I thought that the counter position was not pro-abortion but neutral on abortion and for allowing decisions to be made by individual women, consulting with their doctors and whomever else they trust.
The same is true for Redbox and Verizon, Comcast, Blockbuster, and whomever else might jump into this space.
No matter what a "draft expert," journalist, or whomever else says, writes, and projects; these fans will stand up and debate to the death why their guy should be drafted higher than another and blah, blah, blah.
Kenny later said that he was concerned that he would fall down the stairs and lose consciousness, and was afraid that Robinson would take his firearm and use it on him or whomever else was in the building.
The gentleman sent to the sidewalk Porta-Potty, for instance, isn't merely directed to sit in it; he is asked to get tissue and reading material from anyone passing by and then engage in a one-minute conversation with whomever else he can find, all the while screaming out from behind the closed door.
They can then share that prototype with peers, clients, and/or whomever else is involved in the project and receive feedback.
Guarantees are another price-maintenance system, helpful in reducing a consignor's risk and potentially increasing profits for the auction houses or whomever else guarantees the final sales price, as they take a percentage of the earnings over the guaranteed price.
