That is a great set of aloe pictures, Thijs.
Some nice full-size plants. The Aloe wickensii looks unusual... the leaves are normally incurved, not spreading, and the flowers don't have any yellow in them. Maybe a hybrid? Or maybe just growing in a shady place where the rosette can relax completely.
Be strong and keep warm, you people in colder climates. We have gotten down to 48°F. It should not get much colder than that.
Aloe flowers from the park
The other succulents in the picture include 4 native agaves (front), 3 Euphorbia polygona hybrids (in between the agaves), 2 more tree aloes and 2 stemless aloes in between the trees.
Another aloe in bloom in the public garden... some nice fiery tones.