Surprisingly Liszt wrote quite a few easy (easier) pieces.
Here are some:
Etude op. 1 no. 4 – written when Liszt was only 16, this etude sounds much more difficult than it is, and eventually it grew on to become Mazeppa. So if you cannot play Mazeppa, start with this one (grade 5/6).
Years of Pilgrimage: first year Switzerland – no. 2 Au Lac de Wallenstadt. (grade 7/8 )
Years of Pilgrimage: 2nd year Italy no. 2 - Il Pensieroso (grade 7/8 )
Years of Pilgrimage: 2nd year Italy no. 3 – Cazonetta del Salvador Rosa (grade 7/8 )
Five Hungarian folk songs S. 245 (grade 5/6).
The Shepherds at the Manger S. 186 (grade 5/6)
Sancta Dorothea S. 187 (grade 5/6)
Consolations, S. 172 no. 1 (grade 5/6), no. 2, no. 3 and no. 4 (grade 6/7), no. 5 and no. 6 (grade 7/8 )
Wiegenlied 174 (earlier, easier version of 1854) (grade 5/6)
The Christmas Tree S. 186 (grade 5 –

A set of 12 pieces that Liszt apparently wrote for children, but he probably forgot this, since there are octaves, double thirds, stretches, and so on.
Five piano pieces S. 192 (grade 5/6). This is the easiest Liszt you are going to come across (very high quality nevertheless). Main difficulty are the key signatures.
Nuages gris S. 199 (grade 5/6)
Valses Oubliees S. 215 (grade 8/8+)
Bagatelle without Tonality S. 216a (grade 8+)
Abschied S. 251 (grade 6/7)
Good luck!
Best wishes,
Bernhard.