Voice Actors Required for Fan-Edit project of Peter Jackson's The Hobbit

I have been working on a fan edit of Peter Jackson's The Hobbit trilogy as a personal, non-profit project for the last 5 years and am very interested in adding some new dialogue for the characters of:

Bilbo Baggins (Martin Freeman)
Bard the Bowman (Luke Evans)
Gandalf (Ian McKellen)
Beorn (Mikael Persbrandt)
Dain Ironfoot (Billy Connolly)

As such, I am looking for voice actors / impressionists who can effectively mimic any of the above's voices from The Hobbit trilogy as accurately as possible.

I am open to anyone auditioning, but I will be very picky as the voice absolutely has to mirror the actors' voices from the actual movies as closely as possible so that it might fit seamlessly into the edit.

Please let me know which character you would like to audition for and I will message you with a short line or small paragraph for the character which you can record and send to me as an audition piece. If you think you can attempt multiple voices then let me know.

I understand this is quite a tall order but this is an absolute passion project of mine and I'd love to make it as perfect as possible.