Lady Macbeth is considered by many sources to be way much more ambitious than her husband and also much more passionate of character, angry, ruthless and plenty more.
The best proof of this is Macbeth himself stating how his wife is a male spirit inside the body of a woman, which shows that even he admits that she has the capability of getting whatever she wants by whatever means she deems necessary.
Another thing is that Lady Macbeth herself wishes to have been born in the body of a man to commit the murders of Duncan et.al herself. A woman with such angst and desire to suck the marrow dry of anything for her own benefit definitely is showing signs of being a bit more overbearing than her peers and certainly more ambitious than anyone else around her.
Undoubtedly,in the play Macbeth has been portrayed as an ambitious personnel but at the same time he is well aware of his own limited means.He had a tinge of fear in his mind which has been openly divulged in the "MURDER SCENE".He is frightened of every noise around him.Many a times ,he doubts the appropriateness of his enterprise.His sense of guilty-consciousness portrays an imaginary dagger in front of his eyes.His actions were often guided by his wife and her timely motivating gesticulations and provocations.Perhaps,he would not have commited the murder of Duncan had he not been strongly tempted by his wife.
While on the other hand,Lady Macbeth becomes very keen to watch Macbeth as King just after receiving his letter.Her verbal signs of motivation towards her husband is indeed a noteworthy manifestation of her ambitious nature.Perhaps,she temporarily loses her real identity.She deliberately calls upon darkness to hide her evil intentions.She also doubts Macbeth's manhood when Macbeth expresses his reluctance in going along their plan.She also says that she is even ready to pull up his milk-feeding baby from her breasts and dash its brains against the walls just to keep her word.She even shows her desire to kill their guest King Duncan with her own hands but fails to do so as her face resembles her own father's.Such statements show that extreme ambition has deviated both her 'mind and body' from its normal course of action .
These points are probably quite suggestive of the fact that Lady Macbeth is more ambitious than Macbeth Himself.
SATYAKI PAUL(DON BOSCO SCHOOL<LILUAH)
Lady Macbeth more ambitious between the two because she is a very passionate, angry, ruthless and determined character.
A proof is that, Macbeth was having second thoughts about murdering King Duncan, where as Lady Macbeth says that she would rather kill her own child then back out of the plan to kill King Duncan.
offcourse lady macbeth is more ambitious than macbeth beacuse we see through out the play that how she manilulates her husband. And from macbeth's quotes we come to know that he's not willing to committ that sin but she challenges his manhood and provokes him to do so as she says that i would have killed Duncan if he"d not resemble my father..