I tried the game with 5 controllers and 2 arcade sticks, here's what I can say from that:
8bitdo:
- M30: Fine, lightweight, respoisnve (BT and wired) just make sure the D-Pad is set to Left Analog, the four-button setup runs fine and it's responsive.
- Pro2 :Runs fine as well (BT and wired). I find the D-Pad more precise than the thumbsticks (PS-style stick and pad layout).
- XBox One Elite controller: Runs mostly fine (wired) but I don't like the thumbstick nor the D-Pad with this layout for fighting games on the PC, the XBox 360 controller has the same issue on the PC for me where for some reason it's a little too sensitive (maybe it's me) and I drop or mess inputs too easily. However in itself it's fine.
- Arcade Stick: fine both wired and over BT (can slso pair over wifi 2.4G using the enclosed dongle, didn't try it but there's a little more input lag I read), but I have a slight issue with the stock stick, the course is a little short and I feel like I drop some inpiuts with how I hold it (sometimes I can't do Iori's Yaotome (QCF,HCB+P) followup DM (QCFx4+LP+HP) or his third Aoihana (QCB+P). But it's customizable and you can change the stick with a little soldering (it's even possible to find 5-pin connectors and use the stock connector but the board includes an 8-pin soldering base too). For about 100 EUR/USD I'm generally happy with it. It's a little smaller than you'd expect so you can't really rest your wrists, but it's okay, better than many compact sticks made by HORI. Don't expect tourney-style mastery without customizing it though.
HORI:
Fighting Commander (PS3/4): Runs fine (wired), nothing special, the D-Pad is responsive. It's good
Didn't try the PS5 or XB1 version, but it should be in the same league. Very good.
SONY:
DualShock 4: Using DS4Windows it works fine in XInput mode. From memory it didn't pair so well with the controller either in PS4 mode (using DS4Win) nor in raw BT mode (DS4Windows turned off). If you like using the PS controller it's very responsive and the D-Pad is not bad either. Forget about the DualShock3, pairing it is such a pain it's not worth it not that the DS4 is available (got mine 2nd hand a few months ago and I'm really happy with it).
Microsoft:
- Xbox 360 controller (wired): it's the 360 controller; it's good and reliable, I just find the stick and D-Pad a little too sensitive and I fell the layout (I usually love asymmetrical thumbsticks) not too suited for fighting games.
Mayflash:
F500 Elite: stellar arcade stick but pricey at about 150 EUR/USD (moreso than the 8bitdo) but all the buttons and the stick are genuine Sanwa parts and it's more precise. It's very good but it's bulky and heavy).
So in a nutshell, here are my favourite controllers for fighting games on the PC:
- 8bitdo Pro 2
- Sony DualShock 4
- HORI Fighting Commander
- Mayflash F500 Elite
Honourable mentions:
- 8bitdo M30 (little small but responsive, no vibration whatsoever)
- 8bitdo Arcade stick (decent for casual/intermediate play;, customize it for advanced gameplay)
If you want a one-size-fits-all controller because you're the only one in front of your computer, I'd say go for the 8bitdo Pro2 controller, it will do everything fine and you can switch to DInput, Android and Switch mode too. It's a more affordable than the DS4 too. Plus it's BT so you'll free a USB port (easily 10 to 15 EUR/USD cheaper for the wireless model and even cheaper if wired).