Logan, in my option are the ones best suited, their already a well established airline.
They've been doing FAM flights with BXA (ATR) on both the IOM-MAN/LPL.
They offer connections with KLM, Qatar, Emirates, BA, Turkish and others. (
https://www.loganair.co.uk/contact-u...line-partners/)
They also boast a very good public opinion, particularly in the U.K.