Looks like more stiltgrass and the last two photos nimblewill.
Since sedges (the yellow nutsedge in your first question) and grassy weeds are treated with different herbicides and your lawn is more than 40-50% weeds, renovation may be in order.
Please take time to read through our publication on Lawn Establishment, Renovation, and Overseeding, which outlines the step-by-step process in detail. https://extension.umd.edu/sites/extension.umd.edu/files/_docs/programs/hgic/HGIC_Pubs/lawn_pubs/HG10...
If you decide to renovate your lawn, the first step would be to do a soil test to find out your current pH and nutrient levels. You can find information about soil testing here: https://extension.umd.edu/hgic/topics/soil-testing Starting from bare soil will allow you to amend your underlying soil, if needed, with lime and/or organic matter. This will set the stage for the successful establishment of your new turf.
The best time to establish a lawn is in the late summer – early fall. The next best time to seed would in mid-March through April. For full sun lawns, turf-type tall fescue is recommended for most situations. Recommended cultivars tested by the University of Maryland are listed in this publication. https://extension.umd.edu/sites/extension.umd.edu/files/_docs/programs/hgic/Non_hgic_pubs/TT-77%20Re...