Some are clearly additional synergistic, but none of the classes will clash with the warforged traits. Muti Ability Dependent (MAD) classes might be fewer optimum, even so the amplified survivability from the CON Raise makes up for it. So goliaths are fairly powerful and athletic creatures, with a solid motivation https://gnome-wizards13578.bloguetechno.com/dnd-high-elf-lifespan-no-further-a-mystery-63592904