Don't think Lenglet stays. Think the wages will be a stumbling block and we will go in for a long-term LCB signing, i.e a Gvardiol or Bastoni. I think he's been decent so far but unexceptional defensively. He's classy on the ball though, no doubt..
The three you mention need to go for sure. Just not good enough.
You can easily see Barca wanting his off the wage bill; possibly at the expense of accepting a nominal trf fee..... In which case the net impact of those wages is significantly reduced. He's no titan; but he's steadier than I expected him to be.
Once the other clubs start to wave their chequebooks about, I really can't see us getting 2 of Skriniar, Gvardiol & Bastoni in one window. That would be a serious dent in the CB market and would require none of the richer clubs wanting to recruit in that position.