Vocal ranges
 

In their primes : Jon (early 90s) Dave (early to late 80s) Richie ( early 90s) Alec (???) Hugh (???) who do you think had the biggest vocall range? My guess is Dave or Jon .

Alec had really high falsettos, but in terms of pure vocal range it's definitely be 80s-90s. He could do some pretty sick things back then.

For those who haven't seen this one, it's worth seeing.

Is this even a real question?

The answer is Jon Bon Jovi.

Hugh is like a poor man's version of David when it comes to those high notes. Alec got high falsettos that even Jon can't nail after SWW(correct if I'm wrong). As far as my memory goes, Richie can also sustain long and high notes but on a lower octave to Jon's. Same goes to David too but on a higher octave compared to Richie. Jon had a huge range and if you want to know it then watch the video above

Not too high but high. Hugh is important, during one of the soundchecks in Malaysia 2015, Hugh sang It's my life almost the entire song only by him, what a great job he does.