I have often thought that the airline that has just had a major prang - is safer. Usually, this concentrates the minds of everybody involved and they to prevent it happening again.
The true measure is not one prang - but to look at their history across the last 20 years and see how many a/c they have lost. The actual number of deaths is not such an indicator because how people survive and die is down to luck at that split second, but losing the hull of the a/c is a very good indicator, in my view There are publicly available places to make such an enquiry.