My tried and trusted for years was always the ODI Rogue. There wasn’t anything else with reasonable girth for years, but now there’s a lot more options. Here’s some other grips I’ve run (or am running now) over the last few years that have compared favourably…
-Ergon GE1
-Ergon GD1
-Gusset S2
-Whyte Trail-V (these come OEM on lots of Whyte full sus bikes)
-DMR Deathgrip
Anything sub 31mm I’ve found to be too narrow and cause lots of hand fatigue, none of these have caused me problems.