Really sorry to hear about your OML.
I think you must first find out from the CAA whether you would be able to hold a Single Pilot Multi-Engine IR with that limitation. If not, then only an MPL is possible for you commercially; tagged onto an airline scheme.
Of course as you say, you can keep enjoying yourself with your current PPL even though you are restricted for Class1.
And btw, you can paradrop/ tow gliders with a PPL.