How to escape and display WYSIWIG output

I am using the tinymce WYSIWIG Editor so the user can add some HTML tags. Currently, I display the data in raw form but I feel the need to escape unwanted HTML tags and attributes to make it more secure and stable.

I searched and found this solution: How Do I use htmlspecialchars but allow only specific HTML code to pass through without getting converted?

But I feel like search and replace in HTML code does not work very well and seeking a better more up to date solution. Like what about attributes? Looks like tinymce creates <span> with style="".

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