If i were he or if i were him ايهما صحيح

[GALAXYY]

If i were him
لانها ياتى بعدها ضمير مفعول

[جواد عوض]

he= subject pronoun
him= object pronoun

so, the answer is:
if i were him/her/them/ you,...

[رأفت ابووجدى]

الإجابة الأولى هى الأصح If I were him

[osama moftah]

after verb ebe we put a nomantive pronoun and the expression it's me at the door is not correct from the gramatical point of view

[مستر سعيد دراهم]

if i were + object

[Nassif]

If I were he

[Mr. Medhat Salah]

May Allah Bless You for This Wonderful Piece of information