I feel your pain. I also have a long oval head shape that so far only fits comfortably in an Arai Profile. If you find anything else that works let us know!
Currently pretty impressed with the Icon Airmada
It truly is a long oval head form!! (I got the white/black Chantilly one for less than half the price of a new arai signet Q)
If the profile fit you fine, the airmada will too.
The profile is sliiiiiightly longer oval-just barely, and the signet q is even just a smidge longer than the profile.
It flows way more air too, the shield refuses to fog, and the visor mechanism is much more durable.
The profile hugs your ears and cheeks more. This icon feels roomy at the ears and doesn't smoosh my cheeks. Just up to your preference there as both are a snug fit around the crown and neck.
In the arai profile I found myself accidentally biting the inside of my mouth over bumps and my ears would ache after long rides of being a bit cramped. Not so on the icon airmada!
Beginning to wonder why the arai is so expensive....the shell is a little stiffer, sure...but the Icon is an absolute steal considering it's a world ECE standard instead of SNELL in addition to just being a better helmet to live with day to day.
I can't comment on loudness since the profile was my first helmet and the airmada seems to be just as loud.
in fact loads of people complained about the loudness of the profile, but I just ride with earplug anyway.