Isildur wasn't as bad as is portrayed here. Methinks people
are confusing movie Isildur with book Isildur (especially
in Unfinished Tales). While he made a teensty error in
keeping the Ring he did set up Gondor well and said he
was sorry about the Ring thing.
But how about an elf who did virtually nothing all through
the Second and Third Ages and then stayed around Middle-earth
after his wife left (rumored for skirt chasing in Great Greenwood,
although perhaps understandable if you've been married for
hundreds of years).
+ + Celeborn