Apple could buy any one of them, either through friendly or hostile means. Not a single one of those would make it through anti-trust. Shareholders for Cisco would love to get $200 billion for their company; the US Government would never allow it in a million years. Shareholders for Amazon would love to get $200 billion, and they'd likely outvote Bezos' family holdings to agree to the purchase. Larry Ellison would sell Oracle for $300 billion in a heartbeat, and all shareholders would agree. Intel shareholders would instantly take a $300 billion bid; the US Government would never allow that purchase either. Apple also would never be allowed to gobble up either of the telecom monsters; AT&T shareholders would take a cash + $250 billion in shares deal, and Verizon shareholders would easily sign off on a $200 billion deal.
I think Apple would love to own their own telecom network, given their love of all things integrated. The things they could probably do in owning something like Verizon's network would be astounding. It would never be allowed.