The seatmap the OP shows is the 2 Class 777 v2 available on EY website
here.
Rows 21 - 26 are designated "extra leg room" and they do have a few cm more legroom - surprisingly makes a big difference.
Row 20 is a Bulkhead row and has seats with fixed armrests and solid sides, they are slightly narrower to accommodate the tray table and IFE screen. No floor storage during Take Off/Landing.

Row 26 does have a more limited recline and is close to the bathrooms, but doesn't have passengers behind... no one kicking your seat!!!
A really informative map is available on
Seatmaps.com for this 777 equipment, with reviews on seats.