The Linea Mini. Depending how you look at it it's either a hx or a db: pre- heated water is fed trough a hx in the steam boiler to a saturated group with pid controlled heating elements.
Also, in this sense, if the profitec 300 is included, the Breville DB machines as already mentioned by DeGaulle.
And lets not forget the Dalla Corte Mini and Mina.
And off-course the radical Victoria Arduino Theresia, which technically might even be seen as a triple boiler machine. And I think also their very classicaly styled Venus family.
And also VA's sister brand Nouva Simonelli then with the Musica and Oscar II.
If Bezzera machines with their actively heated groups which rely on thermal mass of the group head instead of saturation but do not use a thermosyphon like E-61 are mentioned here then the Xenia espresso machine should also be mentioned, even though it's only marketed in Germany at the moment: http://xenia.coffee/
And shouldn't Decent machines be mentioned here?