Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Remixed from an image that was uploaded to Pixabay by KirstenStar
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
A white version of the very popular linen pattern.
Source Ant Ekşiler
Prismatic Isometric Cube Extra Pattern No Background
Source GDJ
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Remixed from a drawing in 'An Index to Deering's Nottinghamia Vetus et Nova', Rupert Chicken, 1899. The unit tile can be had by selecting the rectangle in Inkscape and using shift-alt-i
Source Firkin
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
High detail stone wall with minor cracks and specks.
Source Projecteightyfive
Black version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
ZeroCC tileable stone texture, edited from pixabay. CC0
Source Sojan Janso
A seamless stone-like background for blogs or any other type of websites.
Source V. Hartikainen
Background formed from the original with an emboss effect
Source GDJ
Prismatic Basic Pattern 2 No Background
Source GDJ
Remixed from a raster on Pixabay that was uploaded by ArtsyBee.
Source Firkin
Classy golf-pants pattern, or crossed stripes if you will.
Source Will Monson
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
An alternative colour scheme to the original seamless pattern.
Source Firkin
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns