Get your hands on Irwin ones and try clamping something tight with them – I don’t get one with them at all – theres a lot of over-chunky styling going on that results in a massive handle and something going on with the ergonomics of them that really upsets my wrist when I use them – if it try to clamp something tight with them it feels like my wrist-bones are trying to escape from one another
I prefer Wurth’s one handed clamp – for comfort in use but also because the release trigger also controls the opening of the clamp, so they’re genuinely one handed as you can open control both the opening and tightening of the jaws with one hand. Not much help as Wurth are generally account only but if you have a branch near you you might be able to talk them into a cash sale
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I’ve used Wolfcraft ones that have the same opening mechanism and again are more comfortable to use than Irwin, they used to be stocked in machine mart but seemingly not anymore, but if you can find somewhere that does stock them try them out as some models do have the controlled/ratcheting opening function and some just have a straight forward click-release
(edit – you can get them on amazon – make sure its the one with the longer release trigger, these are the ones that allow you to fiddle to jaws open and closed singlehandedly)