Trying to put together the outcome I had.
Didn't continue from ME1 save
ME2, I played as female, so no Ashley
ME2 defaulted No Wrex, no Rancni queen
ME2, I lost Thane and Jack on the last mission. Maelon Lived, and I saved the Cure data. Destroyed the Collector Base.
ME3, I let the Geth Die (really, only to keep Tali around. My personal choice from the events was: Let the Geth live. Those damn admirals are a bunch of dicks.). Mordin died fixing the tower, and the Genophage was cured. Survivors (at least till the vague ending) were Tali, Kaiden, Garrus, Miranda, Samara, Grunt, EDI, Kelly Chambers, the Doctor, the 2 engineers.
Didn't have any DLC characters from 2 or 3.
Think the only deaths from 2 & 3, were Thane, Jack, Mordin, and Legion. Might actually be on the "light" side of things.