Do you have a preference for cosplaying male or female characters?
"Tall and thin" would go for most (not all) characters in Code Geass. The character design tends towards noodle boys. *example*
Hellsing also has freakishly tall thin characters. Anderson and the Major aren't thin, and Seras and Schrodinger aren't tall, but other than that...you've got a lot to choose from! Alucard, Integra, Walter
, Rip Van Winkle
, Maxwell, etc.
There are some taller characters in Fullmetal Alchemist. Falman, Havoc and Scar come to mind, though Scar is hardly...thin. *image*
Yoko and Kamina from Gurren Lagann, too. *image*
Basically, what are you looking for beyond "willowy"?
Katsucon 2016 Costumes
(Hobbit/Lord of the Rings)
: Curufin Son of Fëanor
...and saving Angel!Trisha (FMA:Brotherhood) for another time
Cons: AnimeUSA '09, AnimeNEXT '08, '09, CostumeCon '09?, Katsucon '08, '10, '14, '15, '16, Otakon '12, DragonCon '15