I normally list off stuff available at the big box type stores so people can easily find stuff that works at a good price.If you want to spend a little more and step up to the best stuff around this is what I use.
The Andersons PGF Balanced 10-10-10 Fertilizer with Micronutrients and 2% Iron (5,000 sq ft) https://smile.amazon.com/gp/product/B08FXR8R75/ This one is very mild and balanced. I use this in the early spring and fall when the lawn is starting up or slowing down.
The Andersons Barricade Professional-Grade Granular Pre-Emergent Weed Control – Covers up to 5,800 sq ft (18 lb) https://smile.amazon.com/gp/product/B07NZ2BMMK/ I put down per-emergent at least once a quarter. This stuff is great to stop my neighbors weeds from spreading to my lawn.
The Andersons DuoCide Professional-Grade Lawn Insect Control – Covers up to 9,000 sq ft (18 lb) https://smile.amazon.com/gp/product/B07PH2ZZJH/ I typically place this down in early March, late May, and September to control grubs and other burrowing insects.
The Andersons Professional PGF Complete 16-4-8 Fertilizer with 7% Humic DG 5,000 sq ft https://smile.amazon.com/Andersons-Complete-16-4-8-Fertilizer-sq-ft/dp/B07SYLCKRH/ This is my spring fertilizer for when things need lots of energy to grow like crazy.
Advanced 16-4-8 Balanced NPK – Simple Lawn Solutions (32 Ounce) https://smile.amazon.com/gp/product/B06XWFL84R/ This is great for supplemental treatments in the whole lawn or troubled spots. I typically spray it the day before getting rain or my irrigation system running. I find that helps to get it watered in for a quick response.
For spreading all of the dry material I just use a typical hand spreader. https://smile.amazon.com/Hand-Powered-Engineered-adjustable-assembled-immediately/dp/B07KMWVBJS/
I also like to add home compost, composted manure, and cheap garden soil in areas needing soil improvement but you can find that your average big box store.