I used GH 3-part and it worked really well. (I followed the so-called "useless" schedule.). Got tired of the tedium of 3 bottles, paying the supply-chain cost of water.
You mentioned organic. I went the same direction. I wasn't enthused with the prospect of baking my own soil, brewing teas, etc. I considered the "boutique" lineups from General Organics, Roots Organic, etc. But, those seemed like gouging again. Just didn't feel right to me the same way GH's "lineup" didn't (although I only used 3-part. I didn't go in for all the other products on the "schedule."). Also read these products don't produce as well as true (DIY?) organic.
Anyway, I settled on Grow More Sea Grow. It contains organic sources, dry, and inexpensive like the often touted Jack's Classic. It costs about $1 per plant. I immediately tasted the richer/deeper taste organic people talk about.
The only problem I had was feeding too much, leading to salt build up and acidic soil. After cutting back, everything's working perfect. It took me a long time to figure that out because I was use to GH 3-part's more immediate response to overfeeding. With Sea Grow (any organic nutrient?) it may not manifest itself as burnt tips, just a slow acidification.
You might try that. It's cheap, not a big buy-in to try it. It's a nice in-between (between Jack's Classic and full-blown organic). Nobody would accuse Grow More of being an over-hyped rip-off.
You rarely hear of them, and their web site seems to be geared more toward large-scale farming than hobbyists.