I don't know why you would need alternative to MEW. Do you need an eth wallet with specific functions. Is it for security?
But anyways, the closest and maybe even better alternative to MEW is metamask plugin for chrome browser, mozilla and brave browser. It's really popular and secure too. You can store ton of tokens there and there are no speed issues also. And most importantly, they have a built in feature which alerts you if you send your tokens/ETH to a scam ETH address. So you should certainly go for that. You can get it here:
https://metamask.io/