Davies has scores 102 goals in 442 league games - steady but not spectacular scoring rate i'd say, with the exception of one season at Chesterfield.
https://en.wikipedia.org/wiki/Craig_Davies_(footballer)
Tyler Walker has really dropped right out of favour at Forest, with Aitor Karanka's arrival. He's score 10 goals in 58 league appearances, never manageing more than 3 at any club. Read about the complete flop he was at Bolton, where he made just 5 appearances in a 3 month loan spell and ended up playing and training in the youth team. Word on social media is/was he's an arrogant t*sser and bit of a bad lad...
Khan could be the best of their 3 signings. I remember him causing us real problems at Yeovil, the season before last...