Are you using wall-on-tile or wall-next-to-tile? (i.e. does your 2×2 base include the wall or is the wall next to your tile?)
If the wall is next to the tile, then the 2×2 curved (F) tile fits perfectly next to the included curved (G) wall.
Since you’re editing your tiles, you could just cut the top of the straight wall off and put a curve modifier on it.