Final answer:
Lady Macbeth from Shakespeare's 'MacBeth' is the character that aligns with the provided descriptions, showing ambition and a driven personality, willing to go to great lengths for her husband's advancement.
Step-by-step explanation:
The Shakespearean character that matches the descriptions provided is Lady Macbeth, a pivotal character in William Shakespeare's tragedy MacBeth. The passages quoted point to a woman of ambitious disposition, someone who is deeply in love with her husband and wishes the best for him, even to the extent of conspiring to commit heinous deeds to ensure his advancement. This is encapsulated in the iconic lines from Act 1, where Lady Macbeth urges her husband to muster the courage for the grim deed of killing King Duncan, and in Act 2, where she chastises Macbeth for his fear and guilt after the murder, leading her to take charge of the situation and frame the guards for the crime.