I saw your other comment after posting this. I checked against a wikipedia list of recent terror attacks and I am mostly convinced. the only attacks with comparable death counts from a single bomb seem to be car bombs, which I gather are considerably more difficult to source material for and deliver in a developed country.
Yeah, I always thought this too. Like, maybe planes are more "glamours" target that's slightly better in numbers terms? Then I commented here and had to back it up and the numbers are crazy. I'm a bit surprised governments have signed off on the increase in size from 747s (450ish) to A380s (850ish).