Alec Cr. He is solid with his 7 attack, and when not hit by SoA he can deal 8 dmg, which is devastating.
Top 3 would be
Alec Cr (his 8 damage helps 2hko in any hand with nearly all low star staples)
Glosh (cause he covers a high weakness for Rescue, SOA)
then Kerry (cause she covers the other weakness, SOB as a bonus and other attack manip)
Alec Cr: the best, but banned
Kerry: SOB is a monster but Courage clashes with Anita
Glosh: Will be a blank 6/6 often, which is not so hot. Rescue have plenty of Stop characters. Either he is in a deck with all of them, but he shouldn't be the only one used. Stop is good on low * characters not high * characters. So you would play him if you were playing the two other Rescue Stop characters in a Anti- GHEIST deck or something.