So far, probably Hai to Gensou no Grimgar, but since we're only one or two episodes into the season, things may still change. There certainly are other strong candidates as well.
I love Erased opening song not my favorite but the anime so far is 9/10 for me. KONOSUBA -God's blessing on this wonderful world! I'm definitely a fan. Probably my favorite anime of this season. I just love the comedy in it. Takes a new spin to the whole "go into a different world and start an adventure" adding comedy in it. Hai to Gensou no Grimgar does take a new spin to the ^ as well, adding the fact that it shows a lot of the reality of an adventure world. It's pretty interesting and deep. Musaigen no Phantom World, Mai's boob physics's ENOUGH SAID <3 New Waifu?? Anyone? Prince of Stride - Alternative, I like Shounens. No one has taking a step into running shounen anime. This one is interesting. Music is on point. Dimension W, Cute robot girl has me hooked to this anime sadly that is all LOL.... BUT YEAHHHH those are some of the animes I am watching. Watching more but too lazy to talk about the rest.
2)Schwarzes Marken - lots of potential for brutal epic, hope the studio delivers
3)Erased - off to a good start, but we'll see how it goes
4)Undefeated Bahamut - Prince of Former kingdom must become everybody's bitch. He's also the one responsible for single-handedly bringing down the empire. Then all these people are running around from the loyalists faction trying to restore the empire, wondering why he betrayed them, but the entire time I just can't help but scream "do you retards even know who you're trying to pick a fight with?" Bahamut is OP.
5)Phantom World - okay so far, but KyoAni usually finds a way.
6)Grimgar - starting terribly, maybe it'll get better. The getting trapped in a death-game is becoming overused really fast. The newer shows just don't drive the fact that it's a death-game which is the story & the director's fault. First impressions are really important. Shows like these cold like from Gate, Total Eclipse, etc.