Vocal melody development

I’m a developing independent artist working on an alt-pop record, and I’m looking for support specifically with topline (vocal melody) development for one song. The lyrics and core chord progression are complete, but I’m intentionally seeking a collaborator to help shape the vocal melody and guide how the song should be sung. This is so I can get an idea of which melody works with the lyrics, so I can record it myself later in production. I’m drawn to emotionally direct but restrained writing, with the vocals leading the arrangement rather than overproduction. Sonically, I’m inspired by artists in the Chappell Roan / Billie Eilish / Gracie Abrams lane.

Additional info:
I need the vocals tuned as well. The song has less than 10 tracks recorded that need mixing. I don't need the song mastered. I'm interested in working with a very experienced mixer. I don't have a hard deadline for this. . I'm an indie artist.