Okay, this requires a block of text.
The sound designer is the person who does all the non musical sound effects (and some musical ones), be it swords, the wind, footsteps, etc.
As for the style of music you want to have, I have a clear idea on what it should sound like, just by reading your description of the game.
It's also convenient to have the composer and sound designer early in the team, because, in essence, creating videogames is just failing upwards, so by having this role covered, you allow the person working on sound to fail upwards alongside the team.
As for me:
I am a professional music composer, producer, beatmaker, mixing and mastering engineer with over 13 years of experience in the field, I have 5 years of experience playing various instruments (drums, bass, piano, guitar, kalimba) and 8 years of experience producing music, mainly electronic music, but I also have experience in orchestration, ambient, rock, pop, jazz, etc.
I have previously worked in videogames as a designer so I can provide feedback and ideas into your game.
I do not have sufficient experience with middleware like wwise or fmod, but I do have an intermediate understanding of unity, as well as a basic knowledge of coding in C#.
I'm very creative, imaginative, proactive and responsible with my work.
I can fulfill the role of senior composer and sound designer, but depending on the scale of the project I may need an assistant.
My portfolio: https://musicfromlirio.wixsite.com/main
I hope you are interested in my proposal.