Filter by time not useful when looking for actions that need larger time blocks

I often struggle finding actions that need larger blocks of time.
E.g. I have available a 1h time block, if I then use the 1h filter, I see almost every task.
Instead of “X min and less” I’d need the less part optional. (Although I’d happily do without the “less” part.)

Solution A (considered good enough):
This could be easy to implement and would be good compromise regarding development effort and outcome.

Solution B (considered perfect but at a high expense):
The perfect solution would be the possibility to select a time span with a slider.