45-70 and 50 Alaskan. But presumably there is no demand for 50 alaskan.
This:
https://cuttingedgebullets.com/458-400gr-lever-gun-safari-solid
Or this:
https://www.midwayusa.com/product/774323/woodleigh-hydrostatically-stabilized-solid-bullets-45-70-government-458-diameter-400-grain-box-of-10
These are brass, that seems typical of DG solids.
Problem with 45-70 is that the to fit levers it can't stick out of the case all that much, so the heavier the bullet the lower the case capacity in an already under powered situation So it seems 400 grains is near the limit in brass.