By channeling the Roman general Cincinnatus, Malcolm is demonstrating that he has a very rare, but very noble, quality that would, in fact, make him a great ruler.ДЄli makes a good point in stating that Malcolm obtains the most вЂњking-becoming graces,вЂќ up to this point, because of his ability to make rational decisions (4.3.107). Furthermore, this quote shows that Malcolm does not particularly want to be king, which is actually a good quality for a ruler to have, since it will make them less likely to rule tyrannically for personal gain and overstep their power. After seeing what happened when his father became too cocky and confident in his position as king and let his guard down, Malcolm does not let himself think he is the lone candidate for the throne - there are others, like Macbeth, trying to usurp his power. When Malcolm said 'I have none' (IV.iii.107), he is not showing doubt in himself, he is showing his humility. Part of why Malcolm has demonstrated the most 'king-becoming graces' is also because he does not crave power, which makes him an ideal person to rule because of his humility. While that is an interesting point, I think your interpretation of that line is incorrect. Banquo is willing to graciously accept so little compared to the honorable title that Macbeth is given, revealing that his true desire is to ensure the safety of the king and Scotland, a sign of pure devotion. Banquo is perfectly content with only receiving an embrace for his efforts, despite the fact he 'hast no less deserved nor must be known no less to have done so' like Macbeth and fought hard for Scotland (1.4.34-35). While Macbeth received the title of Thane of Cawdor, Duncan awarded Banquo with 'enfold and hold to heart' (1.4.35-36). While fighting alongside Macbeth, he was 'noble' and fought hard for his country (1.4.33).

As well, Banquo demonstrates that he is loyal to the crown during the civil war and shortly thereafter when meeting Duncan. This realization displays Banquo's ability to reason the causes of an event and remain stable even in times of tragedy, a king-becoming grace. Banquo says that Macbeth now has 'all as the WeГЇrd sisters promised, and fear that played'st most foully for 't' (3.1.2-3). After Duncan's death, when the Scotland is in overwhelming sorrow and shock over the loss of their beloved king, Banquo is able to rationalize the motives for killing Duncan, and therefore come to the conclusion that Macbeth is the culprit.

Banquo has demonstrated the most 'king-becoming graces' thus far because of his 'stableness' and ability to think in times of adversity, and his 'devotion' to the crown of Scotland (4.3.110 108).

Macbeth act 4 scene 3