Largely depends on how much blade, the width, is exposed above the liners/handle. Low riding Clip blades in serpentines are never going to offer a lot of grip without a nick or cut-out.
Spears, straight edge knives offer more to get hold of, Hawkbills & Pruners offer maximal purchase.
Here are are few to ponder. Starting with a French Pradel in Horn, Laguioles and most Opinels are easy to get open without using a nick.
The GEC 38 Farmer's Jack is never going to present a problem in opening the master, secondary blade is also quite easy to open if the master is already opened-the beauty of double-end knives over Jacks
Really, most of these straight edges can be got open without the nick, more decoration in fact.
GEC's 56 Half-Hawk doesn't need the EZ-Open notch either
Lionsteel's Roundhead Spear has nicks both sides but you don't need them, nor is this a feeble spring
Bang up to date Fox Knives from Italy using a Leaf type blade in M390 needs no nick but it's decently sprung.