im not better than that lol don't even try and tell me i am, and someone needs to pour cold water on this circle jerk. your question was answered.
if you want the extended version sangakkara, dhoni, mark boucher, mid 00s mccullum was about equal (better with the gloves in all conditions, just as stupid with the bat on 40*), read was definitely better with the gloves but a lesser bat, didn't see enough of jones to comment, didn't see enough of taibu to comment, kamran akmal when he could catch was a very decent player but oh how that changed. early ramdin was a pretty meh player as was early rahim (rahim began in his teens so fair enough).
haddin played for 7 years, we know pretty confidently how good he was. he was a decent cricketer but had massive issues catching and batting away from home which is pretty unforgiveable for a test keeper. at home he was perfect for coming in at 7 on bouncy decks and his natural athleticism kept his keeping good in conditions he knew.
he's one of those cricketers you miss the safety of when your keeper position is unstable, but if say matt prior or even mushfiqur rahim were australian and ready to go in 2015/16 no one would miss him.