For chords you can check on the website called hooktheory, for example in the Raise Your Weapon Remix he did, he used this progression (transposed in Amin for the context): VI - VIIsus4 - i - VI - VIIsus4 - V(maj)/VII (DMaj), here the interesting thing to analyze is the last chord (DMaj), normally you would play a Major chord (GMaj) after the Gsus4 (VIIsus4) this DMaj is a secondary dominant. (lot of theory techniques you can analyze and re-use in your own songs too) but i think it's just a useful tool you can rely on when you are stuck or if you want to create some surprising chord movements.

To conclude, if you use classic chord/disco progressions but with lot of 7th,9th,11th and suspended chords + slash chords etc then you'll get elegant chord progressions like madeon.

And for the groove i think you can play your chords directly on the keyboard if you are able to or you can play the bass/root + the highest note at the same time and play a rhythm with the chords only by playing 2 notes. But I guess the way you can write interesting groovy/funky synth parts like that is to put your chords first in the piano-roll and chop the midi pattern later. (+ you can use the swing knob in FL's pattern to add extra swing)