The best alternatives to EmojiRepo are emojione, Emoji Masks, and Emojiyo Keyboard. If these 3 options don't work for you, we've listed a few more alternatives below.
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Emoji Kitchen Browser is a lightweight site that lets you explore the extensive set of combined emoji in Gboard for Android (https://tinyurl.com/g-board).
This is a free Chrome extension with no "funny business". Unlike the leading extension, this one asks for only sensible, safe permissions. It uses a thesaurus to help you find emojis. For fun, try searching for colors like "green" and "red".