Largest POW besides BTC is probably Litecoin or Dogecoin. 2nd place is probably Ethereum Classic. Hashrate peaked at 300 TH/s and now its below 200 TH/s. Maybe if enough miners give up, then it might be profitable again.
For this to happen we need a new promising PoW which EthW seems to be the one right now although we are only in the beginning stage,we need one coin that will get a lot of the hashrate from ETC and ERG as these coins took the biggest hashrate from ETH after the merge happened.Only when such scenario will be real then we can see profitable mining again,right now we are seeing a lot of miners not shutting down their rigs yet as they think that maybe they will make money for the future despite mining at a loss right now,they already have the gear and maybe also the economic power to pay for electricity despite higher prices.