These is no objective way to determine which of his tracks are "melodic" or "non-melodic". It's just a very complex topic and every person will give you a completely different list.
What counts as a "melodic" track? Obviously, we are talking about electronic music. Traditional instrumentation doesn't apply. It's the art of noise, literally. It's all about the sound. And melodies are parts of the sound design. You can put focus on it, but you don't have to. You can use classic melodic structure. Or not. So melodies are always the main part and also, never the main part.
Melodies contain notes. Notes on the trational solfeggio system. What is more melodic? Track where you have the most number of notes? Or the most variation of the melodies? Or it is all about having a classic pop stucture in the main melody, even if it's actually simpler?
If you want the melodic variation and complex melody lines, then for example, May 1 from Sessions 2000 is actually one of the most melodic tracks Jarre has ever done. It's way more melodic than anything from Oxygene, that's for sure. I can easily play Oxygene 4 on a piano, but definitely can't do that with May 1. The same is true about Near Djaina Or The Train and The River, that's an other great example. Those piano heavy Jarre tracks are obviously more melodic, with more notes than his "classics". But if you don't count those and you want to focus on tracks with pop melodies, then actually most of JMJ's tracks are non-melodic in that sense.
Electronic music comes from impressionist classical music and also from moderist composers. Not from 400-500 year old baroque or Beethoven or anything that "those" comments like to bring up, but from the the atmophere and ambience focused classical music, which wasn't about some very complex melodic structure. In electronic music, melodies are often there to give the sound design itself a structure. For example, you have many layers of noises and all kinds of recorded sounds, but you need to have structure, so you give it a simple, repeating melody line. So in that sense, it's actually very melodic. But often, it uses like 5 notes without much variation.
This is why those "classical music Jarre" comments make no sense to me. Jarre has never been a classical composer, when you look at the notes and only the notes, he is so far away from the complexity of actual Mozart compositions that it's crazy. He never had music with the melodic complexity of actual classical music. Let's take Rendez-Vous 2. The sound design is similar to classical music, because it sounds "orchestral". But the actual melody is actually way too simple for actual classial music, not matter many choir sounds it has. That's why I never really liked that style of music, I think electronic music should have it's own sound design instead of imitating classical music, which is what JMJ did 99% of the time. Using certain type of influences from classical music is importand and great, but he also uses influences from world music and jazz too. Toyko Kid is melodic, but it's a jazz melody, C'est la Vie is melodic, but it's a world music type of melody.
The sound design matters the most. For example: is WfC melodic? You could say that it's definitely non-melodic. But at the same time, it has an obvious piano melody that keeps repeating. It's very simple, very short. But the sound design is no minimalistic, so simple that you can't miss it. Now, what about Zeitgeist? It clearly has a very catchy and recognisable melody line, simple, but memorable. But the track and the album is so noisy and layered that you might not be albe to focus on it or realise that there is a melody.
Actually, what I really love about electronic music is exactly the fact that you can't really draw a red line and say what's more melodic and less melodic. It's way more complex than that.
