The Snow White strategy sidesteps this by running eight different character names across seven Dwarfs
The one potential exception here is Pia Nalaar, which, while she does not technically have improvise, does provide a healthy set of stats and a relevant ability
Mass removal for red tends to suffer from the same problem, but usually the spells you'd like here are X spells like Earthquake or Comet Storm, both which reward big mana, but that can be a hefty price when for a fraction of the cost you could have cast End Hostilities and had the same or better result
After all, while sometimes Commander is about optimizing every slot, curving out perfectly, and executing your game plan with ruthless efficiency, other times, it is about winning a game with a pony, his Food, and all the friends he made along the way
It makes certain avenues of all-in or race style strategies pointless where they are typically one of the best things to do against something you can't deal with and will ultimately beat you
This is a super sweet way of ramping, in colors that are normally pretty bad at that