I’ve played around with all four programs. I guess it just comes down to what you’re using the tool for. I can’t draw so I have no business in Krita. I’ve made logos in Inkscape and have used GIMP and Photoshop for different things. I’ll start most projects GIMP and move to a more specialized tool of I need it.
The church being a nonprofit organization may be able to get GSuite for a super low cost or free.