most of the time the items are the carry, but those items would be better on another hero that scales with them(crit/dmg passive, attack speed, armor, etc).
so any hero can carry but it's best suited for certain ones the same way any hero can be a killer, support, or initiator, but are better suited than others at it.
if it's one of those neverending games and you have a lot of levels and gold, try portal key, mana ring, spellshards 3, refresher, frostfield plate, it's hilarious and gets annihilations in the right situations.