I've had the Timbuk2 Spire (2 maybe?) for about a year and a half. It's fairly slim, can hold 13-15" laptops, can also hold some gear like chargers, powerbanks,

I've had the Timbuk2 Spire (2 maybe?) for about a year and a half. It's fairly slim, can hold 13-15" laptops, can also hold some gear like chargers, powerbanks, a set of clothing, and smaller stuff like you mention. Also does well in rain (at least not torrential rain, but decent rain). I think it's usually marketed as for bicyclists, but I've found it works really well just for walking/commuting.