You and me are both imperfect by default. Our imperfection is not because we sin, it’s because we are not perfect (infinite/omnipresent/omnipotent/omniscient.)
The definition of true perfection is: that which is infinite/omnipresent/omnipotent/omniscient. So long as this definition holds, there are no paradoxes.
Being in something and being something are different things. I have a liver in me. I am a human. A liver has a definition, and a human has a definition. A liver and a human do not have the same definition. Still, a liver is part of a human.
Perfection has a definition (see above). Imperfection also has a definition (Anything that lacks omnipresence/omnipotence/omniscience/infiniteness). Logically, if infiniteness/omnipresence/omnipotence/omniscience ceases to be or is altered in any way, then we no longer have perfection. So long as perfection is not altered, we still have perfection.
Perfection can’t be imperfection (as it can’t be anything other than infinite/omnipresent/omnipotent/omniscient) but it can have imperfection within it. It can have imperfection within it because perfection containing imperfection does not alter perfection in any way. Perfection containing imperfection does not result in the end of perfection being infinite/omnipresent/omnipotent/omniscient in any way.
So where’s the paradox?