Form in menu ux design query

So I have a use case where we have a button that is to trigger the "reassign" flow

this obviously needs a list of people to reassign to (1 or many)

I have a multiselect typeahead creating the list. This is consistent with the rest of the UI/UX design.

I am however not happy with the button creating a dropdown menu, and have the select +2 buttons (a short cut for "assign to me" and "assign")

I do not want a modal. Any other thoughts of how to make this better both UX and UI

ATTEMPT 1: