Your G person in the rankings was good at tennis :)
Your footballer or fan is four letters after the themed letters
The stop one is really hard as its a rare organ stop and a rare medicinal plant of 4 letters around the two theme letters.
I dont really get how the cheating one works but I have an answer based on equity and a note around the theme letters.
Im stuck on the greek but have all the other answers except I can't get my boat in. I have a four letter space bottom left but grrrr it won't go there !
EP