Out of all 3, which one is the best?

If you get the one below it's the best BUT it would be even better with another 8GB of ram. My guess is that you can buy another 8gb stick to make it 16GB and then you should be all set on that machine.

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* SYSTEM SPECS *

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• Intel Core i5-8300H CPU @ 2.30 GHz (Quad Core Processor!)

• 8 GB DDR4 RAM

• 256 GB NVMe PCIe SSD

• 15.6" FHD (1920 x 1080 pixels) Backlit LED Anti-Glare Screen w/ IPS display

• Screen has built-in webcam & microphone

• 4 GB GDDR5 Nvidia GeForce GTX 1050 Ti + Intel UHD 630 Graphics Card

• Integrated Bluetooth

• 2x USB 3.0 ports, 1x USB 2.0 port, 1x HDMI port, 1x Ethernet port

• Windows 10 (64-bit)

• Microsoft Office

So with another 8GB+ of ram, this one will allow for pretty optimal D2R game play, speed and graphics?

I wouldn't say optimal but it'll get the job done

Graphics GOOD to VERY GOOD, game speed GOOD to VERY GOOD?

No.

Here's a video of someone with somewhat of a similar system: https://www.youtube.com/watch?v=6OAVWssBLZw

You'll be pushing things and will probably have to lower the graphic settings and/or your resolution to get a good framerate.

I’m watching the video on 1080p and it looks good enough for me

Things will very slightly worse since you're getting a laptop and that video is on a desktop with similar specs but yes it will be very playable

Thanks for all your help