There are no fully formal translations as you have acknowledged several times. If the KJV,NKJV, NASB and ESV use dynamic equivalence sometimes, then they cannot be considered "fully formal" translations.there are fully formal translations,
and there are the mediating versions that tend to be between formal and free, and those pretty much full on DE!
Nas/Nkjv Esv/Csb/Niv Nlv Nlt
No, the mediating versions are not between formal and free. They are between the more form-oriented ones and the functionally equivalent translations. "The Free: ones are on the extreme right side of the chart.
And you said ESV/CSB/NIV NIV/NLT.
Why did you place the NIV in two different slots?