Ah it's not a massive, maybe more like Premier League - Championship
My recommendations there would be Angel Esmeralda and Point Omega, though that one is short, maybe only 120 pages.
Players is alright too - I'd put the start of that book in the second tier, though I felt it dwindled towards the end. My dad also felt the same way.
What I think differentiates those books mostly is that they're newer works and Delillo's writing took a turn after Underworld where he started to write more conceptual novels. His early ones threatened to do this but they were accessible insofar as being character and/or plot driven. There's a section in End Zone for example which is basically 50 pages of an American Football game written out like it's a war zone - partly inspired by the cold war and Vietnam - but the book is mostly about some kid going to college. Underworld is probably a good summation of the way he was writing until that point because it has some wonderful story arcs (the nun's) but it also feels collage-like the way it moves between different time periods.
If you didn't like The Silence don't buy Zero K. That one is really hard to get into.
Dunno what else to write but hopefully this makes sense