King David wrote Tihimim/Psalms
Buju Banton wrote a song about Psalm 23
The family of Asaph wrote 12 psalms: Psalms 50Psalms 73-83The sons of Korah wrote 11 psalms: Psalms 42Psalms 44-49Psalms 84-85Psalms87-88Heman the Ezrahite coauthored Psalms 88 with the sons of Korah.Solomon wrote two psalms: Psalm 72Psalm 127Moses wrote Psalm 90Ethan the Ezrahite wrote 89
The family of Asaph wrote 12 psalms: Psalms 50Psalms 73-83The sons of Korah wrote 11 psalms: Psalms 42Psalms 44-49Psalms 84-85Psalms87-88Heman the Ezrahite coauthored Psalms 88 with the sons of Korah.Solomon wrote two psalms: Psalm 72Psalm 127Moses wrote Psalm 90Ethan the Ezrahite wrote 89
Asaph wrote 12 Psalms.
david
David
The tradition is that all of the unnamed Psalms were written by King David.
King David wrote Psalms 27.
Psalms 23 says that everything will be accomplished with and through the Lord, and therefore everything will be good.
1) Psalms 23 and 121 are similar to each other. Each is speaking of God's protection and help. The connection to Psalms 137 is that 137:7 is in effect asking for God's intervention. All three mention (23:4) or allude to (121:7) bad circumstances.
King David wrote most or all of the psalms.