Like Father, Like Son???
One thing that keeps reappearing in Tolkiens works is a family model (note, not "model family"π.
You have the Father who is wise and powerful but not a main character.
Then there is the oldest son who has an extraordinary talent of some sort, but is proud and commits evil.
Finally there is the younger son who is more humble. He cannot compete with his older brother, but proves himself when it counts.
There are many variations over this theme, you have Eru-Melkor-Manwe and Finwe-Feanor-Fingolfin/Finarfin (here there are two younger sons, but you rarely see both of them together in the storyline and when you do they show the same character traits). Last example is Denethor-Boromir-Faramir.
There are of course many differences between them, Eru and Denethor for example are very different, but Denethors flaws is more or less caused by him facing a much more powerful enemy. Imagine him in his prime without Sauron and the palantir.
If you streach the imagination there are more similarities and a lot more examples of this trinity or trio if you wish. Any thoughts?