This is going to be expensive

Yes, true :-)

I have this link for you. It filters comments longer than 10 words, and second filter would include accounts that shouldn't be taken... without creating a blacklist - hmm, ok, let's call it an ignore list :-)

In this example, I have used the tag hive-108800 for the community Venezolanos Steem, as you are a moderator there. But it works in the same way for any community. The interesting point for you is the ignore list:

I have named it ‘josludtxt.txt’ for this example, you must of course create your own list with a different name so that no one else can change it.

You can see the list by clicking on "Edit List".

If you only want the results from solperez, for example, simply enter the user under "Only results from:" field:

This is: A results page for comments posted by an author that are longer than 10 words.

Of course, you can enter any value in the “Words” field:

I actually wanted to write more, but I think you can already do something with this. Maybe more later, a post about the new version I've just put online will follow in a few days...