I have a question and I need an answer

[lathspell]

I will certainly not tell you to read the Silmrillion, for the answers you are looking for aren't in it.
As for the sons and daughters of Aragorn, I regretfully have to say: I don't know.
After the passing of Galadriel there were still great elves in M-e:
- Cirdan Shipwright, lord of the havens
- the sons of Elrond, Elrohir and Elladan
- Celebron, who didn't go to Aman, but went to Rivendell to dwell with the sons of Elrond. He went to Aman many years later.
- Thranduil, king of Mirkwood, still lived there.

I don't know what you mean by the word 'thrived', so I tried to search it up on a online-dictionary but that didn't work either. If you mean: what lands were now glorious and important (or something like this), than I'd say Gondor and Arnor under the realm of Aragorn, Rivendell still was of importance.