Like you, I find the exaggerated proportions of the Warlord Games mini's rather awful. Overly thick arms & legs and "Commando Comic" facial poses.
I am just about to order some RKX Heer minis from a local print shop who have a licence for their range and I should receive them before the end of the month.
If you can wait a couple of weeks I will be able to post some comparison shots so you know what you're getting from them. I will be interested to see how the vehicles (Hetzer, Kettenkraftrad) scale with my existing stuff.
Also bear in mind that you can shrink / enlarge STL's by a %. So if these don't mix well with other ranges a bit of tweaking may make them more acceptable.