well i tried my idea and the trunk roads included are:
EO51 E 85 Ardanio - Ormenio
EO1β Chalastra - Thessaloniki
EO2 E 79 A2/A24 junction - Thessaloniki (widened section of Langada street)
EO2 E 86 Florina - Thessaloniki
EO3 E 65 Larisa - Kozani & Ptolemaida - Florina
EO5 (sections where A5 is not completed)
EO6 E 92 Larisa - Trikala
EO6 E 92 Trikala - Panagia (will be demoted to primary after A3 is complete)
EO8 Athina - Eleysina
EO9 E 55 Patra - Pyrgos
EO20 Ioannina - Kalpaki
EO22 Kalpaki - Kakavia
EO27/EO48 Thermopyles - Itea - Antirrio
EO90 (sections not upgraded to motorway)
EO91 Leoforos Syggrou/Poseidonos
EO83 Kifisias/Thiseos etc
EO111 Thessaloniki internal ring road (not officially defined as motorway)
possible candidates:
Larisa - Karditsa
Lamia - Karditsa - Trikala (until A3 is complete)
Vari - Koropi
Igoumenitsa - Preveza - A52
also other major urban highways like Vouliagmenis, Mesogeion, Vasilisis Sofias/Amalias etc
so i think we are very close