Answer:
SAMUEL
Samuel heard from the Lord throughout his life. 1 Samuel 3:4 says, 'Then the Lord called Samuel'. The author of the book of Samuel notes that during these times visions and words directly from God were rare. Though Samuel began to hear from God.
Samuel was called by God. 1 Samuel 3:1-21 tells of Samuel hearing the Lord, and thinking it was the Priest Eli. After the third time, Eli finally says to Samuel, 'Go and lie down, and if he calls you, say, "Speak, Lord, for your servant is listening"' (1 Sam 3:9).
He was a righteous man, who walked in the ways of the Lord. 1 Samuel 8:3 mentions that his sons did not walk in his ways, and thus were punished by the Lord, but Samuel was righteous before God.
Samuel communicates to the people of Israel a defence of his own integrity. He says, 'Testify against me in the presence of the Lord and his anointed. Whose ox have I taken? Whose donkey have I taken? Whom have I cheated? Whom have I oppressed? From whose hand have I accepted a bribe to make me shut my eyes? If I have done any of these, I will make it right.' They people of Israel reply to Samuel with, 'You have not cheated or oppressed us...' The people were affirming publicly Samuel's integrity.
Samuel would at times cry out to the Lord (1 Sam 15:11).
He may have had integrity and righteousness, but that did not make Samuel a push over! 1 Samuel 15:22-23 tells of Samuel's forthrightness towards Saul, after Saul disobeyed God. You could say that Samuel had a righteous anger at times.
When Samuel died, 'all Israel mourned for him'
DAVID
David was, according to a servant who knew of him, a brave man and a warrior. He was a good communicator and a fine-looking man (1 Sam 16:18).
Samuel anoints David (1 Sam 16:13), and the Spirit of the Lord comes upon him in power.
The story of David and Goliath, you have this sense that David is eager and tenacious. His trust in God is greater than his fear of the giant.
Whatever Saul sent David to do, he did it so successfully, that Saul gave David a high rank in the army (1 Sam 18:5). 'In everything he did he had great success, because the Lord was with him' (1 Sam 18:14)
David built loyalty amongst some. He developed a strong bond of mateship with Jonathan (1 Sam 20: 4).
David inquired of the Lord regularly (1 Sam 23:4).
David had an opportunity to kill Saul (1 Sam 24), but he cuts off a small portion of Saul's robe and becomes, 'conscience-stricken'.
Humility was a key characteristic of David's life. Even with Saul chasing him down wanting to kill him, David still called Saul, King, and continued to call himself a servant (1 Sam 26:18).
Even David questioned Yahweh's plan for him at times - 'One of these days I will be destroyed by the hand of Saul' (1 Sam 27:1). Though remember God had anointed him a long time ago by Samuel to become King. (David experiencing Doubt)
David was greatly stressed at one point, because people wanted to stone him (1 Sam 30:6), 'But David found strength in the Lord his God.'
David loved to worship God (undignified). The predominant writer of the Psalms.
Saul was the people's King and David was God's chosen King.
SOLOMON
Bathsheba gave birth to David's son - Solomon.
Solomon was God's appointed King of Israel (not his brother Adonijah) (1 Kings 1:11-14).
David said to Solomon, 'So be strong, show yourself a man, and observe what the Lord your God requires. Walk in his ways, and keep his decrees and commands, his laws and requirements, as written in the Law of Moses, so that you may prosper in all you do and wherever you go...' (1 Kings 2:2-4).
Solomon was known as a man of wisdom (1 Kings 2:9).
Solomon was young, when given the reigns of kingship. He prayed, 'So give your servant a discerning heart to govern your people and to distinguish between right and wrong' (1 Kings 3:9).
'God gave Solomon wisdom and very great insight, and a breadth of understanding as measureless as the sand on the seashore' (1 Kings 4:29).
Men would come from all around to hear Solomon's wisdom.
David had a vision, through the prophet Nathan to build a temple for Yahweh. Solomon built the temple.
David was the visionary
Solomon was the organiser/administrator
Solomon failed to 'finish strong'. 'The Lord became angry with Solomon because his heart had turned away from the Lord, the God of Israel, who had appeared to him twice. (1 Kings 11:9-11). The Lord tears away the Kingdom from his successors, and so we begin the topsy-turvy period of the Kings in the Bible.
Explanation:
This is all correct, and say they were cleansed through all of these sinless and righteous actions.