Note: some of the links below are affiliate links.
This is everything I use for my new niche site at the moment:
CMS: WordPress.org
Host: Wealthy Affiliate (I have a bunch of sites hosted there already, so this just made sense)
Theme: Kadence
Plugins: Site Kit by Google, The SEO Framework, Ad Inserter (for adding affiliate disclosures to every post automatically), Code Snippets (to redirect post author to about page), WP Sitemap Page (for an HTML sitemap).
Logo/favicon design: Did it myself in Canva
Keyword research: Curated Keywords
Content: I wrote the first few articles, and have outsourced the rest to Hands Off Publishing, Passion Posts and CLICKVISION so far. Of those, my favorite and the one I’ll be ordering from moving forward is CLICKVISION.
Monetization: Amazon Associates (will add ads once it starts getting regular traffic)
SERP position tracking: SERPROBOT