I'm so sorry for your loss, Floyd was way too young!
Maybe this will give you some hope. Bunny is my 6th German Shepherd. My first, Lara, lived to 13 years 3 months. Tori lived to 14 years 1 month.
Ianna is 14.5 years old and still pretty active for an old bat! Monster Mike is 9 years 8 months, and Bunny is a baby. Full disclosure here, I did lose one dog (Logan) to cancer 2 weeks before his 11th birthday...
So yes, there ARE healthy GSDs who live good long lives! I hope your next dog is one.
Ianna, age 14.5, taken 2 days ago:
--Regina and the GSDs:
UCDX von Sontausen Holy Grail (The BUNNY!) HGH, UD,RA,BN,GN, ASCA UD RAX High in Trial
PAM Monster Mike SchH2,UDX,OM1,TD,RE,VER
PAM FGDCh Ianna von Sontausen UDX,BH,TD,RE,PT (4.26.1998 - 2.11.2013)