In the 20th century Obits were generally somewhat fuller -there were at least two papers in Douglas as well as local papers in Peel and Ramsey (Courier) which would tend to give more coverage to local personalities
All these newspapers are on microfilm at Manx Museum but you will almost certainly need to find someone to search for you as I doubt if library staff have the time (you could try enquiries@mnh.gov.im) - I believe (but never confirmed ) that copies of these microfilms are held at the UK newspaper library at Hendon in North London.
However most entries will be simple factual 1 or 2 lines in the 'hatches, matches and dispatches' section