If I had to reccomend one, it would be deadmau5's 4x4.

Pretty much anything by Noisia. I'd check out their newest release, Outer Edges.

Meh listening to current electronic music for mixing and mastering advice is pretty boring and only half useful imho. I think a lot of the producers most people around here would recommend for their production expertise are good because they don't mix like they're making electronic music (by which I mean club music where people are trying to find new ways of making music EVEN louder).

That said, I have a Magic A/B (amazing and underappreciated plug) preset where I typically reference a selection of tracks from:

Galantis-Pharmacy (Good for immediacy and overall pop compatibility)
Madeon-Adventure (Mostly for getting drum levels right)
M83-Hurry Up We're Dreaming (Vocal atmosphere and warmth)
Porcupine Tree-In Absentia (Clarity and mid range...make sure I'm not mixing like an asshole)
Random ELO track depending on what Im working on (overall songwriting)
Most Importantly: the last track I released (make sure what I'm currently working on sounds better)

Usually have 3 or 4 slots open where I cycle in different songs to fit the mood. Often something from Mr Bungle-California or Smash Mouth-Astro Lounge...just songs with really strong songwriting and production.

Oh I should probably add that focusing on referencing your tracks against things for the sake of scrutinizing your songwriting is more productive than trying to make your mix better. Usually if the songwriting is really strong the mix is 80% taken care of.

for electronic I would try look for anything mixed by Wez Clarke - he is probably one of the absolute best mixing engineers in the game and has done work for a ridiculous amount of people.
I thought porter Robinsons latest work sounded pretty good.
Eric prydz and deadmau5 are always good to look at for mixing, great balance in their work.

Also check out some more electronis 'band' type stuff for example RUFUS, Fenech-Soler, Rudimental.....stuff like that.

Anything Rob Swire works on is very well mixed. Koan Sound has some great mixes as well along with Noisia and Deadmau5.

Any song by grey.

joe la porta is a great mastering engineer
theres many but he has mastered for tiesto, above & beyond, BT, armin van burin, theres a list of his CV on his wiki

mastering is an art of itself, those engineers dedicate their lives to it!

This.
https://www.youtube.com/watch?v=P7bdECd3pQ0&list=RDP7bdECd3pQ0#t=3