The big titles by Paradox Interactive... oh wait, they're strategy games, they don't count... do they?(!)
Personally, I don't think any substantial franchise has an all 'masterpiece' game list... screw that no franchise really has an all 'good' game list.
KotOR is marred by tOR and 2's bugs
ME is marred by ME:A (and 3 for some)
Witcher is marred by 1 (being an SP MMORPG and the fucking sex collectible cards)
AC is marred by... the sheer opportunity Ubisoft gave for shooting themselves in the foot (repeatedly)
TW is marred by Attila and ToB (and others depending on how harsh you want to be)
DE is marred by IW (and MD for a lot... it was huge step back from HR IMO at least)
HoI is marred by the various shitstorms it generated and 1 being kinda crap
DoW is marred by Soulstorm's utter lack of balance and polish, 2 being divisive and 3 being shit
Leaving EU (Paradox's Europa Universalis), which is consistently well received by audience and critics alike, including their spinoff titles (Rome/Victoria etc.).
But w/e...
In any event, I fail to see how Doom deserves any sort of 'masterpiece' tag... it's an FPS... you shoot shit, which is fine, but it's visceral, not cerebral, lacking any and all narrative.
But what do I know, I play strategy games, so fuck my opinion...