As Dr. Eckleburg posted above about Ephesians 2:20, the Apostles are definitely "rocks" and foundation stones" as well. *All* the Apostles share in that ministry.
The wrong way to look at this is Peter's authority opposed to that of the Apostles. The right way to look at this is that all the Apostles share the same authority as foundations and rocks, with Peter having a special role in that regard (exemplified by the keys, which no other Apostles have).
Luke 22
24 Now there was also a dispute among them, as to which of them should be considered the greatest.
25 And He said to them, “The kings of the Gentiles exercise lordship over them, and those who exercise authority over them are called ‘benefactors.’
26 But not so among you; on the contrary, he who is greatest among you, let him be as the younger, and he who governs as he who serves.
27 For who is greater, he who sits at the table, or he who serves? Is it not he who sits at the table? Yet I am among you as the One who serves.
28 “But you are those who have continued with Me in My trials.
29 And I bestow upon you a kingdom, just as My Father bestowed one upon Me,
30 that you may eat and drink at My table in My kingdom, and sit on thrones judging the twelve tribes of Israel.”