Fitz's H40 Optimized Ogryn - Classic Tauntgryn
 Ogryn Build - Warhammer 40k: Darktide 

This is my proposal for Tauntgryn. Slab is still super comfy for high Havocs and the added flexibility of the tree lets us fit more damage in. The build shown has Feel No Pain, as is common for Havoc, but you can also swap to Heavy Hitter if you want, as shown on the Bullgryn proposal. Some ogryns I play with like No Pushover + Hard Knocks, if you find a point to spare or want to swap things around. This is also pretty good.

Remember that you can taunt snipers and gunners with your slab shield without bleed-through, but if you're not running shield, you can swap "Attention Seeker" for something else.

As for blitzes, Rock has gotten less value. Its big benefits are stunning bosses and 1-shotting some maniac specialists (flamers & mutants) regardless of where you hit them, their HP, or modifiers. I'm running Frag Bomb more and more, but Rock is still solid. Bombs Away is usually worse than Frag in most cases.