I had one previous space-age run that stopped a bit into Gelba. If im honest I really didn't care for the spoilage mechanics. Finally getting to the point in current run that planet explorations on the horizon. Want to try something different. Please recommend me a good planet to try next without spoilers (or spoilage).
I like Fulgora. I'm not sure what you consider spoilers so I won't tell you why.
The other option is vulcanus.
Gleba is the most annoying one for sure.