iCloud says Password is Wrong Even Though I Know It's Right
Not a solution just a verification.
Since you can not see the password, that you pasted or typed I sugest to verify what is in the password field.

For that
Open iCloud in Chrome
In the log in paste your password- But DO NOT try to log in.

Now to make it visible do following:
Right click on the password field and select "Inspect Element"

That will open a new window that looks like this



Move the cursor on the password field:
there will be a highlighted line in the bottom window as you can see:


Right click on the highlighted line and select 
Edit Attribute 

Now it will highlight the word "type", now you write "show" instead "type"

Magic, now it will show what is in you password field.