Is it wrong to write: "Είναι σύγχρονος άντρας"? I've picked up the habit of dropping the indefinite article in these types of sentences, but I'm not entirely sure when it's allowed and when it isn't.
Yes, it is perfectly right. With the idefinite it is just a little bit more emphatic.
Άνθρωπος is not appropriate in this case?
Is μοδέρνος wrong here?
For me it was accepted "μοντέρνος".