
GL.iNet
GL-MT6000 (Flint 2)
OpenWrt enthusiast's choice; good value, but lacks 6GHz.

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Did you try the Asus GT-BE98 Pro or the Asus GT-BE19000AI routers? I have the Asus GT-BE98 Pro and can personally attest to it having far reach for its 2.4Ghz and 5Ghz networks.
You can go with ASUS be86u/88u/92u/96u or unifi dream 7 and unifi express 7. These are expensive models tho, but you get what you pay for! Especially asus routers with the ASUSWRT Merlin firmware!
I bought a ASUS RT-BE96U and it seems to be great so far. The 10g wan port allows me to get full use out of my 3 gigabit upload/download speed. And the link aggregation works well. It’s definitely a good replacement for my sub par ASUS RT-AXE7800 (wifi 6e).
I’ve had it for a week now, it seems to work really good. But yes it is big, it’s quite a bit bigger then the axe7800 it is replacing https://preview.redd.it/8r6s8k9znlmf1.jpeg?width=4842&format=pjpg&auto=webp&s=a44c1a612235befe8bb50f3699b73950c3b2dda4
No offense, but Ubiquity is not the right choice for everyone. I looked into doing that at My house and I would need a minimum of 3 access points, and not the $99 ones. I would have needed the U7 Pro Max at $280 each. One Asus router in access point mode covers my whole house for $450. Not worth going the Ubiquiti route for me. Probably not for OP either.
With the Asus,I only need the one for the whole house.
My 2 cents go to the Asus rt-be96u.
I picked up the be92u the other day for the far end of my house. Decent little router, and at that cost a solid value. I was actually somewhat cross shopping it with just a 10g/2.5g switch since that has the same port setup I was considering... For about $110-120 more I got the router. I already had 2 of the BE96U routers (main one in my home office and second in a detached garage/man-cave, $300 each as open box from Newegg) so I'm pretty locked into Asus for the mesh. Now have Ethernet drops and consistent gig+ wifi everywhere I want 🤙... The link speed to the garage via 5ghz/6ghz MLO usually runs around 3gig +-500mb. But yeah the be92u has become my generic recommendation for the "I want a decent router but not to spend a ton" folks.
If you have the router located in the centre of the house, you'll get Wi-Fi everywhere. The Asus is fine, the TP-Link is an old model, you want "Be" models, and they MUST say 6Ghz. https://www.ple.com.au/products/663150/tp-link-archer-be800-be19000-tri-band-wi-fi-7-router That's an example, do not get "dual band" Wi-Fi 7.
That's just an example, just to be clear. The 550 came out in 2023, it was a first generation unit. Also it only has 2.5GbE ports, the 800 has 10GbE. Its way overkill for now but who knows what might happen, also do you replace your router often, how much is your phone worth etc?

GL.iNet
GL-MT6000 (Flint 2)
OpenWrt enthusiast's choice; good value, but lacks 6GHz.

Ubiquiti
Dream Router 7
Advanced management, but limited Wi-Fi 7 range, SFP+ issues.

Ubiquiti
Dream Machine Series
Comprehensive control, stable for large homes, but slow support.

Ubiquiti
UniFi Dream Router (UDR)
Modular, user-friendly, but tricky advanced setup, poor penetration.

GL.iNet
Beryl AX (GL-MT3000)
Travel king, versatile, OpenWrt, but bulky power adapter.