I would argue that there is plenty of large(above billion dollars) companies that bring net good to world. Manufacturing is good field. Producing things like machinery improves quality of live and productivity.

Not that these often doesn't have negative aspects when they strive for even higher value extraction, looking at something like John Deere. Still it does allow massive efficiency gains in farming.

I wonder if there's a general rule that the larger an organisation the more pronounced the diffusion of responsibility and the higher the likelihood of shady behaviour? It would be interesting to see some studies into this either way.