So basically you want and high reputable exchange that never be a victim of hackings or not possible to get hacked so it will be totally safe for everyone to store their funds? That kind of exchange won't be exist, hackers will be always smarter time by time. Also, everyone are supposed to not storing their assets on any exchanges. You can trade and make profit there but store your assets only on your private wallet.
We don't need to have that kind of exchange as we are supposed to trust no one.
I'm glad the OP brought out this issue and yes we do need a good crypto currencies exchange because the situation happening with exchange site here and there is a huge turn off for new investors and existence users either. However, we are not talking about trust here and if nothing is do about the situation it might be a bigger for crypto sphere in the future.