Good alternative to Adobe Photoshop

Adobe products have always been the bane of my Mac existence , and lately they seem to have gotten even worse (notably running multiple processes in the background constantly accessing my keychain and connecting to the internet without being explicitly launched). As near as I can tell there is no way to avoid this, so I need a good alternative app. A paid app is fine. As close as possible to Photoshp's feature set would be nice, but I do not do professional image work, but mostly basic web design elements and tweaking of photos.