Self-opinionated
The word for someone who thinks they are perfect is "narcissist."
Paranoid, maybe?
The term for someone who thinks they are superior to everybody is "narcissist" or "egotist."
Pensive.
The term for someone who thinks of others is "considerate."
Presumptuous ,
selfless, considerately empathetic.
The word for someone who thinks they can do no wrong is "self-righteous." This term describes a person who is confident in their own moral correctness and judgment, often to the point of being arrogant or dismissive of others' opinions.
pretentious
Hypochondriac
One word that describes someone who thinks they are better than others is "arrogant." This term conveys a sense of superiority and a lack of humility in their interactions with others.