Hello. I’m Guild Leader of a Horde guild on the Connected realms of Lightbringer/Mazrigos. So minus point for us already 
However, from what you’ve said potentially we might be what you’re looking for.
The only thing I will say is that, if you’re wanting to raid in Mythic, then we’re not 
Notwithstanding all that - we’re a casual, friendly guild. We’ve been around since early 2007 and not planning on going anywhere. We raid twice a week - currently Heroic Sanctum (4/10) on a Wednesday and Normal on a Friday (10/10).
We also often have organised events for PvP (battlegrounds, etc, for a giggle, Friday evenings) and M+ (Mythic Mondays, usually a mix of low level and higher level (12-15+)).
Throughout the week M+ and Torghast runs are also regularly organised on an ad-hoc basis.
We are currently looking for more people to join our higher level M+ team (13-15+ with the aim of higher), and also for more guild members/raiders generally.
We are happy for people to join our discord and join M+ groups if they wish, prior to making any commitment to transfer - although of course with us being horde and you alliance, that makes that a tad more difficult
If this sounds of interest, please feel free to drop into our discord channel - have a chat, feel us out, feel free to ask questions and join in: https://discord.gg/gQ2uBGe
See our realm post for more information: [H] Dark Wolves - Normal/Heroic raiding, Mythic+ & Socials Guild