I've only heard a few vocaloid songs and singers but I think the ones i know could sing "World is Mine". The ones I have heard sing this song have changed it just alittle for them, but the other vocaloids could probably change it and make it sound like a song they would sing too. Also the song "Magnet" is perfect for all of the vocaloids. I only heared a few sing it though, but they're all good at it, that I've heard.
I think the song LIE would work well with them if آپ can manipulate English well enough.
The reason I say this is because I've heard it sung سے طرف کی soft Vocaloids really well, but my favourite Len user did a cover with his Power Append that sounded amazing. As long as it works with a few other voice types, it would be one of these songs.