The alternatives to eth are not lacking obviously you will never have the same earnings i would say that you can easily choose between etc, raven, ergo, ethw i would suggest you try them all and see which is the most performing with your equipment
Right now if I had to choose I would go with ETHW.Why you may ask?That is simple because it has the lowest difficulty compared to ETC and ERGO and the price is super cheap.I know it got hacked pretty soon but that was on an exchange and not on your personal Metamask wallet so I would not care much about that news yet,one has only benefits to get from this coin if all the predictions come true and it goes like at least the all time high of ETC at 179 USD for a coin.Right now a 300 Mhsh rig does more than 4 such coins monthly,for the future it is the best investment anyone can make in my opinion.
Ethw is in the same category as bitcoin gold but honestly probably worse. The main use of ethereum is smart contracts. Ethw doesn't even pretend to focus on that. Its nothing more than a forked chain with zero utility and zero value. A circle jerk of miners if you will