Litecoin could be. I dont know the breakdown of the mining polls and how (de)centralized that is. It is possible it fits what you are referring to. The challenge I see is it is also capped. Could Wall Street at some point turn to LTC the same way as BTC? It is possible.
Is it Hive? Well we are not even on the radar of the off radar but, from the foundation, it has the potential. There is enough distribution to be considered decentralized although more distribution is needed. HBD is an algo coin, not tying itself to the traditional banking system through its asset backing (i.e. introducing counterparty risk).
But I, too, am biased. We will have to see how things unfold in the coming 2-3 years with Hive.
While Bitcoin is capped at 21M BTC, Litecoin is capped at 84M. Like Bitcoin, Litecoin also goes through a halving process. Even if capped, it will take a long time to reach that cap; long enough that none of us will be around to care about it even with shorter block creation times.
The big difference between the 2 networks is the mining algorithm. While both networks use PoW, Bitcoin uses SHA256 and Litecoin uses Scrypt. The Scrypt mining algorithm is easier to implement, which allows for more miners to participate. Even if they form mining pools (which is where the centralization is most likely to take place), there will be more mining pools for Litecoin than for Bitcoin.
Scrypt also allows for shared mining between networks which use it, which is what allows Dogecoin mining rigs to also be used to mine both $DOGE and $LTC. This shared mining ability also allows for greater network security as demonstrated by Dogecoin: after that hack which nearly ended Dogecoin shortly after it came online, no hack has taken place after it switched to shared mining (Auxiliary PoW) ten years ago.