Macbeth is the tragic hero and responsible for his own demise.
Explanation:
Macbeth was convinced by his wife, Lady Macbeth that he should murder the king Duncan. He was a compassionate man but was very ambitious too to become the king. Though being a noble man and loyal to the king initially he loses it all towards the end of the play because of his desire for power and position. Even his wife was suspicious about his intentions as she knew he was a kind man. He also associated the prediction of the witches with the murder.
He is responsible for his actions as he got influenced by others. Thus, Macbeth is the tragic hero and responsible for his own demise.