Equity and control are two different things. Board seats, voting rights, stock classes etc are all tools at your disposal to create the corporate structure. Furthermore, with control you can allocate yourself options as part of your compensation, which undo some of the dilution.

You certainly don't want to retain 100% ownership. You need partners who treat this business as their own and share your burden. I think cofounders are vastly overrated, while hiring key personnel and granting them significant options is not emphasised enough.