369,466 people, from the video referenced in Rogue Jedi's answer.
But movies aren't the only high-level canon anymore!
Star Wars: Shattered Empire, Part IV : At least 5
- Luke blows up an Imperial Commandant and at least three stormtroopers.
He also appears to kill at least one more stormtrooper in the preceding battle.
Heir to the Jedi: At least 8
One Imperial agent:
They recovered quickly after the first one cried out with a charred
hole in his chest; whatever armor he was wearing wasn’t up to
deflecting the heat from my blaster turned up to maximum.
Some TIE fighters, one person per fighter:
I squeezed the blaster trigger and held it down as we approached the
edge; two TIE fighters emerged from beneath the ship—the vanguard of
the second squadron—caught bolts in their cockpits, and exploded. Four
down, twenty to go—though the second squadron was still in the process
of scrambling into action.
But the shock wave continued in our direction, too, plowing through
the trailing TIE fighters behind us and shuddering them apart. We
watched on the scanner as the red triangles representing the enemy
disappeared one by one. They kept firing green bolts, as if they were
determined to see us dead before they died themselves. Almost all of
it sailed past our cockpit into the void, but the concentrated fire
was too much to dodge forever and another bolt clipped us, essentially
wiping out our shields except for a courtesy veil of energy as sheer
as a negligee. The fire eased up as the TIEs were destroyed, but the
closest one with the best angle landed one on the rear starboard and,
a fraction of a second before it was obliterated, took out the
sublight engine there, which spelled the end for us.
Four shot initially + one agent + a "string" of fighters (at least 3) is at least 8.