Interesting question. The COSPAS-SARSAT article below indicates 10 pax have been saved from 25 aircraft crashes. No indication of where the rescues happened.
Space Safety Magazine - Cospas-Sarsat life-saving beacons fail to save on MH370
SARSAT-NOAA claims 19 lives saved in 10 aviation incidents in 2016, and 21 people saved from 11 aviation incidents in 2015.
Not enough information supplied to determine what the aviation incident types were, and what device actually saved the survivors. PLB's could have possibly been primarily involved in many rescues.
Sarsat-NOAA
SARSAT-NOAA provide a rescue map, but it won't work for me, the rescue icons don't appear on the map.
SARSAT - U.S. rescues
The indications are that PLB's are the most successful device to save your life, EPIRB's come next, and ELT's have a pretty poor record for saving lives.
ELT's essentially have some major design drawbacks, not the least of which is accuracy of pinpointing the ELT (406MHz ELT's are better than 121.5MHz, but the accompanying false alarm rate is also still high, with only 1 in 9 406MHz alerts being genuine - as compared to 2 in 100 genuine alerts on 121.5MHz).
Sarsat-NOAA - 406 vs 121.5
Antennas being torn off ELT's in crashes feature highly, resulting in malfunction. AF447 was not found via ELT, and MH370 carried 4 ELT's, none of which worked. We have little idea why, and finding MH370 may solve that.
The cabin-mounted ELT's appear to feature highly in malfunctions.
IMO, tail-mounted ELT's are a far superior location, and deployable ELT's, as featured on military aircraft and rotary-wing machines operating off-shore, have a very high success rate.
This Canadian guy has summarised the ELT situation pretty well.
The Use Of Deployable Flight Recorders in Dual Combi Recorder Installations
Of course, there's always the point that numerous crashes have been found via ELT, with no survivors, thus reducing the record of saving lives.
It's a simple fact of life that a high % of aircraft crashes result in no survivors.
The big factor is time taken to locate the crash site. SAR people and medical people speak of the "golden hour" - that first hour is crucial to save many survivors. Delays always result in increased fatality levels.
From the survivor stories below, few aircraft crashes are listed (only two, a broken undercarriage upon landing, and an open ocean ditching).
It's somewhat telling that the vast majority of successful rescues were via PLB's - even the two aircraft incidents involved PLB's.
Acratex - list of rescue survivors