Thiago would be the better signing instead of Wijnaldum most definitely had we not got Pjanic. Pjanic was world class back in 2017 but he's not been great for a couple seasons, Thiago right now is on a different level. However, they are quite similar profiles and Wijanldum offers something different. He is however the most replaceable player in that Liverpool team if Thiago arrives there. Not necessarily out of warranting that, but because Henderson is English and captain so never will be dropped based on that alone.
He's a bit like our version of Seydou Keita,who was a very,very useful player for us and actually had the most total appearances during the 2010/11 season despite getting almost plaudits. Goes under the radar for the work he does because there's not an abundance of goals and assists but still very vital.
I for one would be buzzing if we got Wijnaldum, especially for the price quoted.