[xept]

I tried the Hacker's Keyboard, but Multiling O Keyboard has worked much better for me. It supports swipe input, so I can use it as the main keyboard. And most importantly, you can customize the layout almost however you want (including arrows, modifier keys, function keys, etc). It may be a bit confusing at first, as you need to write your own config in plain text. But other existing layouts could be a nice starting point.

[arcanemachiner]

Just found out about this keyboard. Thanks for the recommendation! I haven't had swipe to text in years since it's not included with AOSP.