I don't really have a dream amp that I'd like to buy. I have found that I like enough different ones that without modelers I'd probably have dedicated Fender, Vox and Marshall based rigs taking space.
Of the ones I owned, I think the Bogner Goldfinger 45 Superlead got pretty close.
I originally bought the 1x12 combo because it would have taken several months to get the head. I don't know if Bogner was hiding gold bullion in that combo chassis but it was as heavy as a Fender Super Reverb! So I took it apart, and built a headshell for it out of paulownia which reduced it to a svelte ~15 kg - nearly 5 kg less than the official plywood headshell.
I liked that it was kind of like a Fender Super Reverb, Marshall Superlead, JCM800 and Bogner Shiva all rolled into one depending on how you set the controls, switches etc. I liked that it did not need to be cranked to sound great, in fact it sounded worse like that.
I didn't like the splashy long tank spring reverb, having the boost controls in the back, or using a 7-pin DIN footswitch control instead of MIDI. I didn't like how you needed to adjust the volume on the OD channel depending on which of the 3 modes you set. The '81 mode got much more compressed and needed the most volume compensation. I mostly parked it on the '77 mode and used the boost for higher gain.
I sold mine because my BluGuitar Amp 1 ME can do those same tones in a fraction of the size, weight and cost, plus lower noise floor. I had a buyer lined up who was interested in the Bogner and boutique amps can be hard to sell if you want something different.
I do miss the clean channel with dedicated EQ though, that sounded better than the BluGuitar clean. That might lead me to get the BluGuitar Amp X since it rectifies that.