Dolan Pre Cursa / PreCursa / Track Champion

Dude, you need a Steamroller.
geo doesn't work for me at all.

I think my Pompet with 28c tyres would do both well. I'd bike happy to ride over firm-ish grass, things like the Lea Valley path, and rougher canal towpaths easily and in comfort. For actual proper CX I'd want to put some knobblier tyres on but otherwise I think it's that versatile anyway.

Small steamroller?

what about an older ish style FGFS frame? like a 2011 subrosa Malum for example

Impossible haha, small compact frame with my 37" inseam would mean I'd need about 450mm of seatpost showing.