Can I use Altaria's "Draco Melody" attack to place a Stage 1 or Stage 2 Dragon type Pokemon directly onto my Bench?
Yes, you can. Per the attack, you are not limited to Basic Pokemon.
Source: Crimson Invasion FAQ (2017-10-20), TPCi Rules Team (2017-11-02)

Relevant cards

Note: All applicable cards may not be listed below.
SM4_80