Name this malady - tomato leaf diagnostics needed

[Reelcharacter]

OK. So I've spent a bunch of time surfing photos / descriptions - including a Cornell plant diagnostics site and reading up on tomato leaf symptoms and am still really not sure what is going on with several of my tomato plants. Lower older leaves are most affected. Planted in a raised bed so air circulation should not be a problem, unless thinning some foilage is recommended. Two plants exhibit wilting of upper new growth but seem to be holding their own and may be coming back. Have been watering at the base to avoid wetting the leaves. Nearby Zucchini have white mold on upper leaf surfaces. Any suggestions based on the photos and description?