I've never tried Wexford before either, but often those sorts of products are mass produced in China by one company and just re-labeled for half a dozen different companies, so searching around may find something similar under a different name.
I will say that some of the ones you listed tend to be the cheapest, lower quality cards I've run across. I use the Amazon Basics a lot, but primarily because they had a sale on their bricks of 500 cards a year or two back and I picked up 20 of them for $2.50 each.
Oxford cards are some of the smoother (inexpensive) cards I've tried in the past, but even their paper quality has shifted a bit over the past 15 years.
If you're doing 3x5 cards in blank, Brodart's library catalog cards are of a much higher quality and durability without breaking the bank and they're wonderfully smooth as well. https://www.shopbrodart.com/
Stockroom plus has some great quality, smooth cards, but I've only ever seen them in gridded format and never plain or lined: https://www.amazon.com/Grid-Index-Cards-Inches-White/dp/B08BJ11LWC/
Notsu also has some high quality smooth cards, but I don't think I've seen them in lined format and they can tend toward being very expensive.
If you have the funds and want something incredibly smooth, try the Exacompta Bristol cards made by Clairefontaine. Their manufacturing process is dramatically different and they're incredibly smooth, particularly for fountain pen use. The downside is that they can be almost 3 times more expensive than other brands. They do carry their cards in a wide variety of sizes and formats though.
One of these days I ought to lay out a grid of the more common cards and do some more serious reviews.