Death rates are probably better than absolute number of deaths for comparison. Here are death rates per 1000 workers of some well known construction projects:

  80    Transcontinental Railroad
  80    Suez Canal
  50    Brooklyn Bridge
  17.46 World Trade Center
   6.4  Sydney Harbor Bridge
   4.47 Hoover Dam
   3.37 San Francisco Bay Bridge
   3.33 Eiffel Tower
   2.67 Titanic
   2.5  Sears Tower
   1.47 Empire State Building
   1.17 Trans-Alaska Pipeline System
   0.75 City Center Las Vegas
   0    Chrysler Building

Topping all of those by a large amount are the Panama Canal and the Burma-Siam railway, which I did not include because I don't have numbers--they are literally off the chart. I mean that literally. On the bar chart I'm getting the numbers from [1] the bars for those are so big they are clipped and the number is not visible.

[1] https://www.forconstructionpros.com/blogs/construction-toolb...