The Trojan gets a mention here and is actually playable
https://www.forgeworld.co.uk/en-US/Trojan-Support-Vehicle-Complete-Kit
The Trojan is a workhorse used by Imperial Guard armoured regiments as a towing vehicle for artillery platforms and as an armoured ammunition carrier, ferrying extra ammunition to the platforms once in position. Each Trojan is equipped with a crane to lift heavy crates of ammunition from it’s hold.
Also the Crassus Armored Transport would likely see use moving supplies by ground where the speed of the valkyrie wasn't needed.
https://www.forgeworld.co.uk/en-US/Crassus-Armoured-Assault-Transport-2018
This immense armoured carrier is named after one of Lord Solar Macharius’ greatest generals, Borgen Crassus, who remained steadfastly loyal to the Imperium throughout the grim and bloody Macharian Heresy that followed the Lord Solar’s death. The vehicle can be retrofitted with additional weapons to fulfill other battlefield roles as required, and thousands of these vast transports were drafted into the 6th Cadian Armoured’s ranks during the fighting on Betalis III.