2001:
Tahu
2002:
Tahu Nuva
Pohatu Nuva
Onua Nuva
2003:
Turahk
Lerahk
Kurahk
Panrahk*
Takanuva
Makuta
2004:
Nuurakh
Vorzakh
Nuurakh*
Bordakh*
Vorzakh*
Keerakh*
Rorzakh*
Zadakh*
Nuju
Tehutti
Ehrye
2005:
Vakama Hordika
Rahaga Iruini
Rahaga Norik
Toa Iruini
2006:
Irnakk
(Vezok, Thok, Reidak, obviously)
Jaller Inika
2007:
Kalmah
Ehlek
Matoro Mahri
Nocturn
2008:
Krika
Tahu Mistika
Pohatu Phantoka
Photok
2009:
Skrall
Mata Nui
Ackar
Gelu
Atakus
2010:
Tahu
2015:
Protector of Jungle
(Sets with an asterisk were built from pieces in the Creature Accessory Kit 400+ piece thingy)
That being said;
Notable collectibles:
Vahi x2*
Disk of time x2*
Shadow Kraata x2*
Sparkly Avohkii