There’s definitely room for multiple block explorers on Harmony and users can use the ones they prefer.
As I’ve mentioned previously, the Etherscan team is not available to support Harmony anytime soon. We are working with the Blockscout team to run a hosted instance for us. We have also hired 2 dedicated developers to continue improving the current Harmony Explorer. Additionally, we are working on plans to create an Explorer DAO and give control of that product to the community. We have not looked into Tronscan but I will investigate, thanks!